Disk Error 20 AX = 423D Drive 9f

[WhiteFeather]

Hey all,

I'm getting the following error when I try to install the new Fedora 9:
Disk Error 20 AX = 423D Drive 9f

This happens immediately on startup... the motherboard tests, I get the line saying Linux ISO with the author's name, and the second line on the screen is the error.

It seems odd, because a couple of days ago I wanted to make sure everything would go off without a hitch and downloaded Fedora 8, burned it with PowerISO, and installed it on the exact same machine. Today, using the exact same procedure substituting the Fedora 9 image, I'm getting the above error... I've tried two separate DVD burns.

Any body else getting this or know what it means?

Thanks,
AML

[stoat]

Originally Posted by WhiteFeather

Any body else getting this or know what it means?

Hello WhiteFeather,

Yes. I have seen many similar posts going back for years. I realize that you recently burned a good F8 disk with the same equipment. But of the threads like this one that get a solution posted, it is almost always something to do with the burner or the disk. Seriously. In other words, don't start trying boot options and things like that. Instead, try a different (better?) brand or type of disk. Other things...

1. Different burner
2. Burn at less than the max speed for the disk (try 1/2X max)
3. Don't use a rewritable disk (I often have problems booting with those)
4. Verify the SHA-1 hash of the ISO
5. Have your burning software verify the data after burning
6. Don't pay much attention to the anaconda Media Test (notoriously unreliable; at least in the past)

To see what I meant about it being known for years, try this phrase in Google: "Disk Error 20 AX"

Many end unsolved or not further commented on. Some end like this one here.. Some people that gave up, successfully installed by one of the alternate methods.

What ever you eventually do or find out, you should come back and finish up this thread. It may help others since many threads like this one just end.

[WhiteFeather]

[*]Different burner

I've got two DVD players, I've tried both - on two machines.

[*]Don't use a rewritable disk (I often have problems booting with those)

Using DVD-R's.

[*]Have your burning software verify the data after burning

Did that.

[*]Verify the SHA-1 hash of the ISO

My assumption at this point is that the download failed. I didn't see the sha1sum file on the linux disc, so where is the correct hash string available? When I ran sha1sum, it reported the following hash:

9920282bc1be7b6a2728c625b394ac15e5023cb1

Anybody know if that's right? If so, I'll try burning it at 1X and see if that helps.

[stoat]

The hashes for the i386 ISO files of Fedora 9...

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

50253a35b5ba128c9a57b2a10cbd829813fc5119  Fedora-9-i386-DVD.iso
af25833a3babe1bd943dae16a1c17cf7a9e0b767  Fedora-9-i386-disc1.iso
d4ffbe83cd75bf0153e821af98b7e56f5b4f6c32  Fedora-9-i386-disc2.iso
579702ea19a5e4114186a665735823dd4b5269b6  Fedora-9-i386-disc3.iso
368e98bf95708d040f83be975c0ede372f32d44b  Fedora-9-i386-disc4.iso
67426850ce065a048d0a04eecb003b383b6f5830  Fedora-9-i386-disc5.iso
c01ccd2d3811ab1f04cacba63e51690b34629f95  Fedora-9-i386-disc6.iso
3b1df20ece05d64c34dd9c64400975b74eded0f2  Fedora-9-i386-netinst.iso
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)

iEYEARECAAYFAkgiX4AACgkQtEJp0E8qb9LLZACfZD/jeqvSfQRQM9EAzGku9mrK
EFwAnRdS28Q9onwS6rExI4vBrS0Ytpt/
=OG7t
-----END PGP SIGNATURE-----

P.S.: Compare to the SHA-1 hash that sha1sum generates from the ISO file. If your hash is from the DVD itself, it will be different due to the effect of padding added by the burning. But there is a way to compensate for that and generate a hash from the DVD to compare to one for the ISO. See how to do it in another thread here.

P.P.S.: If you downloaded a version other than the i386 version (I guessed at that), then get the hashes for the version you downloaded from that same place. They are in the text file SHA1SUM with the ISO files.

[WhiteFeather]

Thanks. I ran that on Fedora-9-i386-DVD.iso, my bad for leaving out the specs... sooo... it looks like a download error. I'll try to re-download it and let you know what's up tomorrow.

Thanks again.

[robatino]

You can try to fix bad downloads with either rsync or bittorrent. You can find rsync servers in the list of mirrors at fedoraproject.org. Example syntax (adjust as needed):

rsync -v rsync://ftp.kaist.ac.kr/fedora/linux/releases/9/Fedora/i386/iso/Fedora-9-i386-DVD.iso Fedora-9-i386-DVD.iso

[WhiteFeather]

Well, I downloaded the .iso on a windows machine, not the linux box (for some reason). I'm simply redownloading it now, but it's taking FOooooreeeeeeevveeeer because the server is so busy. I'm getting about 10-20KBps down. Since last night, I've only gotten about a quarter of the file. But hey, I'm not complaining. I can remember when it took all night to download a few hundred K, and if somebody picked up the phone while you were downloading, forget it.

[stoat]

Hello WhiteFeather,

Well, it may not make you feel any better, but last night I started downloading the F9 DVD ISO. It was making fairly good progress speedwise. After about 90 minutes, it got to about 98% done and ran out of space in the partition. I mistakenly picked a partition without enough room for the file. I probably won't even think about trying again for a few days.

[robatino]

You could join one of the torrents at torrent.fedoraproject.org if you have a bittorrent client on that machine. Just start and stop it, copy in your bad download to the corresponding file generated by the BT client, then restart. With luck it should be mostly finished already.

Edit: This was a response to WhiteFeather.

[robatino]

Originally Posted by stoat

Hello WhiteFeather,

Well, it may not make you feel any better, but last night I started downloading the F9 DVD ISO. It was making fairly good progress speedwise. After about 90 minutes, it got to about 98% done and ran out of space in the partition. I mistakenly picked a partition without enough room for the file. I probably won't even think about trying again for a few days.

Can't you just copy the partial file somewhere else with enough room and resume the download (with wget -c, say)? The copy could be done by burning to a rewritable DVD.

[stoat]

I was downloading in Windows XP. When the download halted and started the little CleanUp utility, I did what I could with it such as clearing caches, etc. I didn't want to compress old files. But what I did wasn't enough. I remember the options to do more with CleanUp or Cancel. I cancelled. There was no partial file left behind. I'm over it and will do it again later.

[stoat]

Originally Posted by robatino

Can't you just copy the partial file somewhere else with enough room and resume the download (with wget -c, say)? The copy could be done by burning to a rewritable DVD.

I downloaded the ISO file again tonight, but this time in Fedora with wget. Turns out that I didn't need the -c though. It came through without problems.

[WhiteFeather]

I consider this problem resolved. My original download had failed without notice. By running shah1sum on the downloaded install file, I found that the hash did not match.

Re-downloading the file until I got one with an exact hash then re-burning the DVD solved the install issue.

... Now, if I could only figure out why the network connection is disabled by default on startup each time, I'd be good.

Thanks for all your help!

[robatino]

What I found by trial and error is that if I leave NetworkManager enabled and running, and go into system-config-network and for the ethernet interface, check the boxes for both "Controlled by NetworkManager" (which is not checked by default) and "Activate device when computer starts", it comes up reliably. No other combination works for me. I tried disabling NetworkManager and couldn't get it to work at all that way.

[WhiteFeather]

Well, I thought I did try that... but by now I tried so many things I may not have actually had that combination... hehe... I'll try again tomorrow.

Thanks