[ale] magicdev

[Cor van Dijk (nav)]

Greetings,
I recently upgraded from redhat 6.2 to 7.1. Now the system behaves
jerky,  freezes regularly for a second or so, then starts up again,
until it completely freezes, only hard reboot will revive it. In
/var/log/messages
I find a bunch of messages like the following:

Dec 11 22:59:40 tower kernel: (scsi0:0:4:0) SCSISIGI 0xe6, SEQADDR
0x18e, SSTAT0 0x6, SSTAT1 0x3
Dec 11 22:59:40 tower kernel: (scsi0:0:4:0) SG_CACHEPTR 0x0, SSTAT2 0x0,
STCNT 0x0
Dec 11 22:59:42 tower kernel: SCSI host 0 abort (pid 0) timed out -
resetting
Dec 11 22:59:42 tower kernel: SCSI bus is being reset for host 0 channel
0.
Dec 11 22:59:42 tower kernel: (scsi0:0:4:0) Synchronous at 10.0
Mbyte/sec, offset 8.
Dec 11 23:00:00 tower kernel: Uniform CD-ROM driver unloaded
Dec 11 23:00:04 tower kernel: scsi : aborting command due to timeout :
pid 0, scsi0, channel 0, id 4, lun 0 Test Unit Ready 00 00 00 00 00

Id 4 is my cdwriter. Other than upgrading I did not change anything.
System was behaving perfectly for a year or so under redhat6.2. It only
seems to happen in X. The problem seems to disappear when I ax a binary
"magicdev", which seems to update icon  links/values from /etc/fstab.
But now I get similar messages on a hung logout.
I noticed on another machine that something ("magicdev"?) pokes at my
scsi host adapter while I am  burning a cd on  the scsi cdwriter which
is attached to that host  Result: coaster!
Any comments/suggestions appreciated. Cor van Dijk


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