Category Archives: disk images

So I was missing Windows 10 Phone, so I fired up the emulator

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First you can download it here:

https://www.microsoft.com/en-us/download/details.aspx?id=53424

In my “C:\Program Files (x86)\Windows Kits\10\Emulation\Mobile\10.0.14393.0” directory I have a modest 2GB file called flash.vhd which contains the phone image. I copy it to where I run my VM’s and run it with the XDE emulator:

"C:\Program Files (x86)\Microsoft XDE\10.0.14393.0\"xde /memsize 3072 /vhd FLASH.vhd

And I’m running in no time, I login, load some apps, then I notice the storage:

What is this, a phone for ants?

What?! the disk image is a paultry 10GB. I guess the idea is that you wouldn’t actually try to load up the emulator like it’s your daily driver, rather you load YOUR app and only YOUR app, and just pretend that this isn’t some weird offshoot nostalgia machine.

Well needless to say something needs to be done about this storage situation.

I look and find this package, vhdutils. I had to go to some sketchy site, but it did include source. I should put this somewhere more legit to take away from all those weird squatters.

Update from the future I put VHD-Utilities over on GitHub, along with downloadable EXE’s. I can’t get the original site to load in wayback to give credit to whomever wrote it.

30/09/2021 09:09 pm 6,995,017,728 FLASH.vhd

So with stuff installed onto my phone I’m almost at 7GB physical 7.6 virtual space. I could go all crazy with 128 or 256GB but it’d largely be stuff I bought… which of course thanks to the magical world of DRM won’t play.

Yeah I guess you are welcome that I bought all those movies, and stuff but sure I wasn’t going to watch them on this phone… emulator. Thanks. thanks again.

So the resize vhd is quick. brutal. and efficient. I go with 64GB, because, why not? I could probably just grow it again if I needed to.

resizevhd.exe v:\Windows10-Phone\FLASH.vhd 68719476736

Now for the fun part. We need to attach the vhd, and resize the volume. I hope you like diskpart.

In the MMC I attach the disk image.. it’ll pop a few folders as it’s got a bunch of drive letters. I’ve never explored a phone, I don’t know if the ARM images are just as weird.

Even more strange, it’s MBR!

So if you were thinking, lots of partitions, and a clear win for GPT, sadly this isn’t it.

Sadly there is no free partitions (although one hiding could be deleted…?) And the UI doesn’t support expanding a logical drive (the green container). But diskpart does.

As indicated above the emulator’s vhd is disk3. You can see it’s the 64GB disk. Select it.

Next list the volumes. The Data disk (J:) is what we want so select Volume 10.

Literally just ‘select volume 10’ and ‘extend’. Don’t tell me this is difficult.

Listing the volumes again will show a 59GB Data partition. Congratulations we did it!

Back in the MMC, you’ll see it as well how the Data partition, along with the green extended partition is now taking up the entire disk. So we can now Detach the VHD, and run the emulator again!

Nice!

And just like that we now have plenty of free space on the emulator.

I downloaded some games, and some music. It’s nice to be back home.

It’s not an extensive list as I didn’t game much on my phone but here is what I know works:

  • Final Fantasy 1
  • Heroes of Larkwood
  • Skulls of the Shogun
  • Sonic CD
  • FL Studio
  • Candy Crush Saga
  • Pixel Dungeon +

Halo Spartan Asslt just closes, and Asphalt 8: Airborne doesn’t get the screen size right so it’s impossible to click enough buttons.

Sonic CD on Windows Phone 10

It’s nice that sonic runs, (haha) although using a mouse makes it impossible to control.

Now one fun thing is that the emulator is x86, nor ARM based so I converted the VHD to a VMDK, ran it under VMware, and YES it RUNS… sort of.

Perhaps a format that never was to be, the Phone/Tablet but it boots quickly and is so responsive. Windows without most of the .. Windows bits. I guess the real experiment will have to be will it run on a Surface?

It’s all 32bit anyways, and such an evolutionary dead end. Pitty.

Aaru 5.3LTS Launch Party

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Claunia‘s Aaru project is hitting a 5.3 milestone, and having a launch party!

Aaru is a fully featured media dump management solution. You usually know media dumps as disc images, disk images, tape images, etc.

With Aaru you can identify a media dump, extract files from it (for supported filesystems), compare two of them, create them from real media using the appropriate drive, create a sidecar metadata with information about the media dump, and a lot of other features that commonly would require you to use separate applications.

On trying to extract files from a Texas Instruments S1500

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So this started out as a weird thing that killed a day for me. I thought it was a little fun to look at but, ultimately I proved that I could extract files, but not from the requested image.

So let’s get into some more details, my failure, and well it’s been raised into another chance for some luck/fast knowledgeable hacker to get a payout to extract a single file.

As mentioned above the computer is the Texas Instruments S1500, the disk image was dumped on bitsavers years ago as s1505_cp3540/s1505_cp3540.dd.gz. As you may guess it’s a raw ‘dd’ of a disk.

Now looking at a few sources namely unix-ag the OS in question is TI System V, an AT&T SVR3.2 derivate. Running strings does reveal ‘SysVr3TCPID’ And this appears to be the Unix Version Banner:

(c)Copyright 1993 Hewlett-Packard Company,  All Rights Reserved.
(c)Copyright 1986-1992 Texas Instruments Incorporated,  All Rights Reserved.
(c)Copyright 1984-1988 AT&T, All Rights Reserved.
(c)Copyright 1979, 1980, 1983, 1985-1990 The Regents of the Univ. of California
(c)Copyright 1980, 1984, 1986 Unix System Laboratories, Inc.
(c)Copyright 1990 Motorola, Inc.
(c)Copyright 1989-1990 The Santa Cruz Operation. All Rights Reserved.
                         RESTRICTED RIGHTS LEGEND
Use, duplication, or disclosure by the U.S. Government is subject to
restrictions as set forth in sub-paragraph (c)(1)(ii) of the Rights in
Technical Data and Computer Software clause in DFARS 252.227-7013.
                         Hewlett-Packard Company
                         3000 Hanover Street
                         Palo Alto, CA 94304 U.S.A.
Rights for non-DOD U.S. Government Departments and Agencies are as set
forth in FAR 52.227-19(c)(1,2).

Along with further extraneous info like:

TI Sys V
V/68-1.0
3.3.2
MC680X0
Hewlett-Packard 9000 Series 1500

Fantastic. Well digging around you’ll eventually find that SYSV filesystems have a magic number, and it’s 0xfd187320

So a simple search through the raw filesystem reveals some:

neozeed@remlazar:/mnt/c/temp$ xxd s1505_cp3540.dd | grep 'fd18 7e20 0000 0002'
0035b7f0: 0000 0000 0000 0000 fd18 7e20 0000 0002  ..........~ ....
00f5b7f0: 0000 0000 0000 0000 fd18 7e20 0000 0002  ..........~ ....
02f5bff0: 0000 0000 0000 0000 fd18 7e20 0000 0002  ..........~ ....
04cc0bf0: 0000 0000 0000 0000 fd18 7e20 0000 0002  ..........~ ....
0505bff0: 0000 0000 0000 0000 fd18 7e20 0000 0002  ..........~ ....
1f1267f0: 0000 0000 0000 0000 fd18 7e20 0000 0002  ..........~ ....

And this fits the bill, as the next 32bit ‘word’ is the version, in this case 2 to indicate 1024k blocks ,and improvement added to SYSVr2. One thing is that the struct to read a super block is 512bytes (or is it always?), and the magic number is near the end, so from the above offsets, subtract 496 (decimal!) and you can get the start and sizes of each filesystem. Fantastic!

Speaking of SYSVr2, Do you know what is another SYSVr2? A/UX.

Shoebill was panned for not emulating the full Macintosh, rather it reads the kernel directly from the filesystem, and boots into it. That means Shoebill can read UFS/SYSV. Great start?

So I took the filesystem code from Shoebill, hacked it enough to let me build on Visual Studio, and point it to a raw filesystem and take a look. I put it here: filesystem.c

Now I’m impatient so it still needs a legit Apple A/UX virtual disk. Granted we don’t need it, but it made it easier to let the existing code fiddle with apple partitions, but when it comes time to read SYSV blocks, I closed the file handle and swapped things around. And that lead to this:

As you can see there is a LOT of zeros. However the magic & type align.

Meanwhile here is what an A/UX SYSV filesystem looks like. Notice far less zeros.

Additionally I was able to get another 68k based SYSV Unix disk, and yeah not all zeros. Also yes, using the Shoebill code it extracted files just fine.

However using my approach on the filesytem I always only get a directory with 2 enteries the ‘. ..’. I modified the source to just count inodes and write them to disk. And use inode 2 is just a tiny file. No doubt with all the zeros the disk is either very corrupted (backup superblocks?! where?! how?!) or the kernel implicitly knows these things, or finds them somewhere else.

I’ve been authorized to give a bounty of $200 USD to be able to extract arbitrary files from the 1505 disk image. I thought I’d give it a shot, but I don’t get how the super block aligns but the data doesn’t. Unless there is some other insane padding thing for a 1k superblock? The more I think about it, it’s probably likely as I know at some point I was skipping 3 blocks from an offset to get to a superblock, and 3 is just a weird number. 1 block header, 2 block superblock makes more sense.

Additionally this table may prove useful, especially for the ‘skip 3’ or pad to 1k:

Tape and disk utility is in progress...

26 partitions, 12-longword descriptors:
     Name    Start    Length   User  Comments
1  * LABL vl 0        2        FFFF
2  * PTBL pt 2        3        FFFF
3    SAVE sb 5        3        FFFF
4    FMT  fp 8        9        FFFF
5    TZON tz 17       296      FFFF
6  * unx1 lb 313      1024     0002  TI Sys V 3.3.2
7  * unx1 lb 313      1024     000A  TI Sys V 3.3.2
8  * unx1 lb 313      1024     0013  TI Sys V 3.3.2
9  * unx1 lb 313      1024     0014  TI Sys V 3.3.2
10   unx2 lb 1337     1024     0002  TI Sys V 3.3.2
11   unx2 lb 1337     1024     000A  TI Sys V 3.3.2
12   unx2 lb 1337     1024     0013  TI Sys V 3.3.2
13   unx2 lb 1337     1024     0014  TI Sys V 3.3.2
14   unx3 lb 2361     1024     0002  TI Sys V 3.3.2
15   unx3 lb 2361     1024     000A  TI Sys V 3.3.2
16   unx3 lb 2361     1024     0013  TI Sys V 3.3.2
17   unx3 lb 2361     1024     0014  TI Sys V 3.3.2
18 * cfg1 cb 3385     17       FFFF  TI Sys V 3.3.2
19   cfg2 cb 3402     17       FFFF  TI Sys V 3.3.2
20   cfg3 cb 3419     17       FFFF  TI Sys V 3.3.2
21 * root fb 3436     12288    FC02  TI Sys V 3.3.2
22   usr  fb 15724    32768    FC02  TI Sys V 3.3.2
23   jdis an 48492    2        FFFF  multi-volume file system anchor
24   pipe fb 48494    1024     FC02  pipe file system partition
25 * swap pb 49518    32768    0002
26   prt1 fb 82286    448972   FC02  part of jdis multi-volume

Did you know there is almost nothing left to document that this poor machine even existed?

Seriously look for “TI System V”

Heck even on the UTZOO archives..

AltaVista UTZOO search (superglobalmegacorp.com)

It’s like 5 posts, 3 being the same, someone who couldn’t dial out, and someone on the old UUCP map! Save me!

HFS Utillities

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I got a question the other day about how to easily move files in and out of Cockatrice III, especially since as part of my ‘try to make it stable by cutting features out’ approach I removed the ability to mount foreign directories under Basilisk II.

For my personal use, I have an AppleTalk LAN, and I just use a Windows NT 4.0 server with AppleTalk, as a file server/proxy and that works pretty good for me, so much so that I didn’t even think of any other way of doing this.

HFV Explorer 1.3.1

One of the quickest and easiest is HFV Explorer, however the ‘catch’ being it doesn’t read SCSI disk images (aka things with partition maps). But for the ‘massive floppy’ images it’s more than fine.

HFSUtils is another approach, it’s like the old ‘MS-DOS utils’ of ancient Unix days, allowing you to ‘mount’ a disk image, and copy files in and out. I thought I’d give this a spin to copy Marathon into my virtual OS 8.1 image. It’s pretty straight forward first ‘mount’ the disk image:

C:\Cockatrice>hmount.exe scsi0.dsk
C:\Cockatrice/scsi0.dsk: contains 1 HFS partition
Volume name is "SCSI0"
Volume was created on Sat May 19 14:04:04 2018
Volume was last modified on Mon Nov 16 14:59:02 2020
Volume has 1056545280 bytes free

Now make a directory:

C:\Cockatrice>hmkdir scsi0:xfer:

And then copy in the file:

C:\Cockatrice>hcopy marathon.sit scsi0:xfer:

C:\Cockatrice>hdir scsi0:xfer:
f  ????/UNIX         0   5627676 Nov 16 15:34 scsi0:xfer:

C:\Cockatrice>

And just like that it’s there!

And yes it unstuffs!

And just like that we have downloaded a game from the garden, copied it into a virtual SCSI disk, and gotten it to run, from the painful CLI.

Wasn’t that great!?

Thanks to shadyjesse Philpem’s FreeBee can now run the C compiler!

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I call it Freebee with C!

Again super thanks to shadyjesse for finding and fixing the larger issues, and philpem for his great emulator, freebee!

So 1970’s

I have to say, having never played with an AT&T Unix PC, it’s kind neat with this windowing non X11 UI. Although even in emulation it’s incredibly slow. But such was the Unix microprocessor revolution of the era, it’s crazy to think the mighty SUN-2 is also on the same level of performance, although SUN would at least go the way of the 68020 before giving up on the 68k for SPARC.

Even though the 68000 lacked the ability to recover from bus faults, allowing a better path to UNIX with the 68010, OEM’s still brought their own MMU technology to flesh it out, leading to divergent systems. Not that it mattered all that much for AT&T as they started to establish themselves as the new defacto go to UNIX vendor they quickly abandoned the market leaving the Unix PC, and 3B2’s to die off. While so many like to think that the ‘Unix’ business is booming, it really only boomed once AT&T exited the market until Linux had started to gain enough mindshare post 1.0… Which also included 68000 support, although aimed for the the stronger 68030/68040’s.

Anyways I’m sure you didn’t come here for my ramblings about the 68000 instead you want an easy to run package to click and GO!

So here, you are, freebee based on build d3c9486 of freebee.

There are two executables, for normies, tourists, and people only wanting to witness the fun it doesn’t matter which one you use. For anyone wanting to install the 3B1 Unix, you’ll want “freebee-10sec-O2.exe”. Since the 3B1 uses a non standard format, if you want to use FAT 360kb disks from a PC emulator then you’ll need “freebee-9sec-O2.exe”. Isn’t compatibility great?

Finally got a Gotek

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It was everything I had hoped it to be. I paid extra for a 3d printed mounting bracket and the cute led display.

I had one adf handy to test, Captain Blood, a nice pirated version so the weird encoding wouldn’t be an issue.

It was kind of nice watching it boot up, although as slow as I remember a mechanical drive being. But at the same time nice not using 30 year old media.

I have a few more upgrades on the way to deck out my 600, although I need to do some kind of RGB thing as the composite video has so much noise it’s unreal.

Anyway despite the old flame war on floppy emulation, the Goteks are dirt cheap, and. Hell if it’ll work in an Amiga, it’ll work anywhere.

Compiling rsync for VMWare ESXi 6.5

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So what had started this little ‘adventure’ is that years ago there was this great sale over at Joe’s Datacenter, where I had picked up a physial server for the mere price of $20 USD a month!  What a deal!  No more quotas, CPU sharing issues and generally having to share.  Awesome!

So I have them install Debian, and load up the KVM modules, and away I go and life is good.  So foolishly years later, I jumped onto the whole container thing, installed docker, and that is where everything went south.

Every few seconds while doing a tcpdump on the 100% virtual bridge I’d see a massive influx of arp traffic.  I tried static arp’s on the host & the guest and it was ‘better’ but now the network traffic would hang.  Things like TCP would break after a minute and stuff like UDP game state would break so bad it’d end up unplayable.  This basically broke maraakate.org and hosting stuff like Quake I/ Quake II/ Daikatana and other iD based games.

My existing virtual machines now had a major issue where they would stop responding to traffic.  I never could find a fix, and it ended up with me moving my blog out to sloppy.io to keep running as a container based service until it magically stopped working and I gave up and did a full dump/reload on a hosted WordPress over at ChicagoVPS.  What a nightmare!

But what about all those virtual machines?

Well even after apt-get purge of everything docker, upgrading and downgrading the kernel nothing helped.  The VMs still dropped off the network periodically.  So with some spare time I decided to just go ahead and backup the box, and wipe the machine.

Since the physical network was working fine I was able to rsync the 300GB+ worth of data over the span of a few days.  That was fine, and considering how crap the server had been, I figured some straight downtime wouldn’t hurt anything too much.  While looking for an OS to install onto the machine, I saw that Joe offers VMWare ESXi 6.5, so I thought I’d just go with that, as naturally VMWare runs both VMs and with Project Photon I could maybe mess with containers again at a later date.

Since rsync had worked so well for moving hundreds of gigabytes of data from the USA to Hong Kong, I figured it’d be trivial to just convert the existing RAW KVM/Qemu disk images back to the United States of America.  And that is where the fun begins.

Let me tell you!

While reading this great post on virten.net they drop mention of XSIBackup, which requires registration (yuck) and worse their stupid registration system is broken:

LOL WHUT?

Rest assured the email does show up!

Dear Neo Zeed, thank you for visiting 33hops.com
This is your download url http://a.33hops.com/downloads/?key=bq7l5ptPB70MJj9dkftxFegr3xWoBZwpdFPQOUC3Cm10KPSIl3v1532877224253

But of course it doesn’t work

The key is invalid or has expired, only two downloads are allowed per key, download a new one at 33hops.com

What

The

Fuck

I know this is an ongoing issue at large when you provide executable binaries on the internet, as you will no doubt get flagged with some false positive by some virus crusaiding idiot who just sets up a tool and never reads anything but sends out threatening emails.  I went through this with the need for the simple 404 redirect, all thanks to Gerhard W. Recher.

So since this wasn’t going to be an avenue to persue I dug a little deeper and ran across this post over at virtuallyGhetto.  So it turns out the userland for ESXi is a CentOS environment that uses busybox.  And if you just download and install CentOS 3.9 into a VM, and build whatever you want, and ideally add in the -static flag, and copy it over.  For those who want to look into more ‘internals’ of the userland, check out zemris.fer.hr.

Great!

Things like UID/GUID mappings are broken in the libc it seems among other things.  So for my simple rsync config I just put the numbers in myself.

uid = 0
gid = 0
use chroot = no
max connections = 4
syslog facility = local5
pid file = /var/run/rsyncd.pid
hosts allow = a.b.c.d

[datastore1]
path = /vmfs/volumes/datastore1
comment = WDC_WD5000AAJS2D00A8B0
read only = no

I have read that you really ought to keep your binaries/config on the datastore so they aren’t subject to upgrades overwriting them and other chaotic stuff.  So editing the file “/etc/rc.local.d/local.sh” I just added the following before the exit 0:

/vmfs/volumes/datastore1/tools/rsync –daemon –log-file=/tmp/rsync.log –config=/vmfs/volumes/datastore1/tools/rsyncd.conf

And then ran it manually to kick it off.

So now I don’t have to rely on someone’s elses broken downoad system, and now we can build other fun native stuff.

And the best part is that after all of this fighting Maraakate’s site is back online and I get this message from him:

holy crap that new server setup so much better
its like playing it locally honest to god
played a whole unit not a single fuck up
no rubber banding lag effect or any of that

So now things are actually performing better on VMWare than we were getting on KVM.  And yes I had flattened out the disk images, loaded up the paravirtual disk & network drives on KVM, but VMWare does such a surprisingly better job.

I honestly wasn’t expecting that.

And as a bonus, I messed with qemu-0.9.0 (I didn’t feel the need to go through glibc2 hell), and qemu-img works great with a simple raw to vmdk

[root@jdc-user:/vmfs/volumes/5b5806fd-339444da-f897-003048d70598] ./tools/qemu-i
mg.static info win30.raw
image: win30.raw
file format: raw
virtual size: 32M (33554432 bytes)
disk size: 32M
[root@jdc-user:/vmfs/volumes/5b5806fd-339444da-f897-003048d70598] ./tools/qemu-i
mg.static convert -f raw -O vmdk win30.raw win30.vmdk
[root@jdc-user:/vmfs/volumes/5b5806fd-339444da-f897-003048d70598] ./tools/qemu-i
mg.static info win30.vmdk
image: win30.vmdk
file format: vmdk
virtual size: 32M (33554432 bytes)
disk size: 27M

And it boots!

Transcopied Windows 3.0 VM

So yes, wrapping up you can in fact run stuff on ESXi, copy data, and even convert disk images.

Oh yeah, and so people can deal with my 404 based download system (the password is on the 404 page)

Let the games begin!

Converting a Physical disk to a Virtual disk with Qemu’s qemu-img on Windows

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Just because even I forget from time to time.

You need to do this as administrator, even better if the disk doesn’t have a drive letter or mounted in any way under Windows.

Fujitsu MPB3021AT

In my case I picked up a 486SX with an aging Fujitsu disk.

qemu-img.exe convert -f raw -O qcow2 \\.\PhysicalDrive2 fujitsu_MPB3021AT.qcow2

And as fast as your machine can read the disk, you’ll have your Qcow2 disk image. As of Qemu 2.9.0 the formats include:

  • blkdebug
  • blkreplay
  • blkverify
  • bochs
  • cloop
  • dmg
  • luks
  • nbd
  • null-aio
  • null-co
  • parallels
  • qcow
  • qcow2
  • qed
  • quorum
  • raw
  • replication
  • sheepdog
  • vdi
  • vhdx
  • vmdk
  • vpc
  • vvfat

Which is quite a list.  Obviously since I’m reading a physical disk, the format is RAW.  I just output it to Qemu for my personal ease.

Also once the image was created I could quickly run it under Qemu, and discover that yes this was a machine running Windows 95.

qemu-system-i386.exe -hda fujitsu_MPB3021AT.qcow2 -soundhw es1370 -vga cirrus

So there you go from a “dead system” to at least fully recovered data in minutes.  KVM may get all the pres excited but it’s nothing without the awesome support of Qemu!

Reading .toast image files

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Well I put out a cry for help all over the place, looking for Darwin 0.3

And much to my amazement, when I woke up, I not only got a reply but a link to a toast image.  Great, what is toast?  Well simply put toast is a format made popular by then Adaptec Toast.  Obviously the sane thing to do is to find Toast, install it, and mount the disk image inside of a Macintosh.

Adaptec toast 4.0

But, honestly, where is the fun in that?

Instead let’s have Cockatrice III do it!  Now I never did get around to writing proper CD-ROM emulation, nor integrating it, but that doesn’t matter!  Instead I’m going to rely on Daemon tools Lite, to do all the heavy lifting.  DTL will create a virtual SCSI adapter, add in a SCSI CD-ROM device, and mount the image.  Needless to say, I’m on Windows and that is where that part of the adventure ends, as Windows 10 cannot read HFS.

Now back to Cockatrice!

All I had to do was assign the SCSI 6 position to the mounted drive letter, and I’m set!  Just add this to the CockatriceIII_Prefs file:

scsi6 \\.\e:

And now I can mount the image from within Cockatrice III

Darwin 0.3 toast mounted

And there we go, now I can copy the files of just like having a real Mac.

 

Adding virtual disks to User Mode Linux

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Running out of disk space

Well my good ‘friend’ with their inappropriately provisioned Linux VPS  that runs UML (User Mode Linux) inside of it, ran into an issue where he needed to add a second virtual disk device.

Creating the disk file is no big issue, adding a whopping 1GB is pretty simple!

Using the ‘dd’ command it is trivial to make a 1GB file like this:

dd if=/dev/zero of=node1_swap.ubda bs=1M count=1024

And then just append it to the script that they are using to run the UML:

/virtual/kernel ubda=/virtual/node1.ubda mem=384M eth0=slirp,,/virtual/sl1.sh

to this:

/virtual/kernel ubda=/virtual/node1.ubda ubdb=/virtual/node1_swap.ubda mem=384M eth0=slirp,,/virtual/sl1.sh

Of course the real fun comes from trying to find the devices.  Having to dig around I found that the device major is 98 for the UBD’s and that they incrament by 16, so that the first 3 devices are as follows:

mknod /dev/ubda b 98 0
mknod /dev/ubdb b 98 16
mknod /dev/ubdc b 98 32

Adding to that, you can partition them, and then they break out like this:

mknod /dev/ubda1 b 98 1
mknod /dev/ubda2 b 98 2
mknod /dev/ubda3 b 98 3
mknod /dev/ubdb1 b 98 17
mknod /dev/ubdb2 b 98 18

You get the idea.

With the disk added you can partition the ubd like a normal disk

node1:~# fdisk /dev/ubdb

Command (m for help): p

Disk /dev/ubdb: 1073 MB, 1073741824 bytes
128 heads, 32 sectors/track, 512 cylinders
Units = cylinders of 4096 * 512 = 2097152 bytes

Device Boot Start End Blocks Id System
/dev/ubdb1 1 245 501744 83 Linux
/dev/ubdb2 246 512 546816 82 Linux swap / Solaris

etc etc.  And yes, you can then format, mount and all that.

First let’s setup the swap:

mkswap /dev/ubdb2
swapon /dev/ubdb2

Now let’s format the additional /tmp partition

node1:~# mke2fs /dev/ubdb1
mke2fs 1.40-WIP (14-Nov-2006)
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
125488 inodes, 501744 blocks
25087 blocks (5.00%) reserved for the super user
First data block=1
Maximum filesystem blocks=67633152
62 block groups
8192 blocks per group, 8192 fragments per group
2024 inodes per group
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409

Writing inode tables: done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 24 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.

Now adding the following to the /etc/fstab so it’ll automatically mount the /tmp directory and add the swap:

/dev/ubdb1 /tmp ext2 defaults 0 0
/dev/ubdb2 none swap defaults 0 0

Now he’s got a dedicated swap partition, and a separate /tmp filesystem.