[EMAIL PROTECTED] wrote...
> Is anyone aware of tagged queuing problems with the following ultra-wide
> SCSI drive?
>
> Vendor: QUANTUM Model: XP32275W Rev: LXY4
> Type: Direct-Access ANSI SCSI revision: 02
>
> Using an array of several of these drives in a software RAID-0 stripe set,
> I can crash the system every hour or two (total system freeze) by running
> multiple bonnies on the array. I've done it under 2.0.36 with a Buslogic
> BT-958 and with an Adaptec 2940uw. With tagged queuing disabled, the
> system appears to be stable with the BT-958. I've not yet tried going
> back to the 2940uw.
>
> Quantum support dennied knowledge of any TQ related firmware bugs, but did
> offer instructions on upgrading the firmware anyway. I've been hesitant
> to try that since their RMA department is unable to replace drives of this
> type that I have that are dead and still under warranty. They offered
> $100 or some vaguely similar drive behind mystery door #2...no
> cross-shipping.
The LXY4 firmware (and earlier firmware versions) on Quantum Atlas II's is
known to be buggy. If you have enough I/O going on the drive and on
the SCSI bus, the drive will go "out to lunch" and will require either a
BDR or a bus reset to wake it up.
The LYK8 firmware rev fixes that problem, and is available from Quantum's
ftp site. You'll need a bootable DOS floppy with ASPI drivers for your
SCSI board to run their firmware loader. I've upgraded 4 Atlas II's, and
haven't lost any data yet. I would still back things up beforehand,
though.
The LYK8 firmware is buggy as well, at least with respect to tagged
queueing, but at least the drive won't hang with that firmware.
The reason your system was more stable with tagged queueing disabled is
probably because you drastically reduced the I/O load on your drive, but
you probably also reduced the random I/O capability of your striped drives.
Ken
--
Kenneth Merry
[EMAIL PROTECTED]
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