[1841] in linux-security and linux-alert archive
[linux-security] Re: Linux DoS attack through autoprobing
daemon@ATHENA.MIT.EDU (Craig Daly)
Mon Jun 8 11:51:13 1998
From: Craig Daly <daly@atl.sofkin.ca>
Reply-To: "daly@atl.sofkin.ca" <daly@atl.sofkin.ca>
To: "'linux-security@redhat.com'" <linux-security@redhat.com>
Date: Mon, 8 Jun 1998 09:20:58 -0300
Resent-From: linux-security@redhat.com
Although this is not Linux related, I think that this is worth mentioning.
Running Window 95 (Try not to laugh) I have run into the exact same
problem. When running scandisk in Windows, when I hit a bad sector on my
Jaz disk, the drive will try to read the bad sector until thge OS times out
and the machine locks up. I have tried and been able to duplicate this
problem with an Adaptec 2920, 1542 CP and a 2940 UW. It would appear that
it is not so much the OS but the Hardware, namely Iomega Jaz and Zip
drives.
If I have made a mistake in posting this message to this list, I'm sorry.
I just wanted you all to know that this is not the fault of the Linux
OS'es.
On Friday, June 05, 1998 1:44 PM, Steve Thompson [SMTP:stevet@myofb.org]
wrote:
> Quoting Dave (dgriffi@ultrix6.cs.csubak.edu):
> > There is a rather annoying problem related to this. I've experienced
bad
> > reactions between my Adaptec aha-2940uw SCSI controller and zipdrive.
> > When the driver finds a bad sector on a zipdisk, the kernel locks,
>
> If this is a worry, you should be able to set the Error Recovery mode
page
> such that it attempts fewer retries, among other things. Specifically,
the
> Read Retry Count and Recovery Time Limit should be changed such that
> delays are minimal. You sacrifice some reliability if you do this, and
it is
> also possible that the zip-drive's firmware won't let you play with those
> settings. I don't have a zip drive to test this.
>
> scsiinfo-1.6 should be available in the usual places. Having the SCSI II
> speification helps, but is available on the Internet, too.
>
> Regards,
> --
> Steve Thompson
> System Administrator, out-patient at the Home for the Incurably Informed,
> Misanthrope
>
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