Anthony's drive issues.Re: ssh password delay
atkielski.anthony at wanadoo.fr
Tue Mar 22 06:55:42 PST 2005
Ted Mittelstaedt writes:
> OK, well then that increases the chances that it is a driver issue
> and reduces the chances that it is a hardware issue. Assuming your
> termination is correct, that would increase chances it is a driver
> issue even more.
That's rather what I've thought all along.
> Going to each single disk is what you really need to do now in order
> to make a definite finger point to the driver.
To each single disk? What do you mean?
I tried a build of the kernel again today, to exercise the machine. For
quite a while it behaved, but then the SCSI errors popped up again. At
least it didn't crash.
> I have been working on a Compaq Professional workstation from time
> to time to setup a test workstation over the last week. It has a
> problem where under heavy use it will corrupt files written and read
> from the disk. This system was always a Windows box before, using
> a 1GB Seagate disk drive. (don't ask why Compaq would supply a 1GB disk
> it is rediculous) Here are some relevant bits of the dmesg
> that might interest you:
> CPU: Pentium Pro (199.31-MHz 686-class CPU)
> Origin = "GenuineIntel" Id = 0x619 Stepping = 9
> ahc0: <Adaptec 2940 Ultra SCSI adapter> port 0x1000-0x10ff mem
> 0x40080000-0x40080fff irq 11 at device 18.0 on pci0
> aic7880: Ultra Single Channel A, SCSI Id=7, 16/253 SCBs
> da0 at ahc0 bus 0 target 0 lun 0
> da0: <QUANTUM FIREBALL SE8.4S PJ09> Fixed Direct Access SCSI-2 device
> da0: 20.000MB/s transfers (20.000MHz, offset 15), Tagged Queueing Enabled
> da0: 8191MB (16777215 512 byte sectors: 255H 63S/T 1044C)
> Now I can say one thing with certainty with this machine - Compaq has
> definitely modded the Adaptec microcode used on the controller here.
> Why do I know this? I know it because I tried removing the 2940 card
> from this machine and plugging it into another non-Compaq machine, and
> the card would not boot the disk in that system. However, a
> non-Compaq-labeled 2940 card works fine in that system.
Compaq has a terrible reputation for screwing around with standard
hardware and firmware. I've always felt that they could still build
good servers even without all their home-baked junk, but they apparently
felt differently. I like commodity hardware and firmware. It's very
hard today to justify custom stuff just to gain perhaps a few scant
percent of performance under highly specific conditions.
> I had assumed the problem with this system was bad ram. But, I think I
> am going to try pulling that Quantum disk out of there and
> using a different one.
You think something on the drive itself is different?
> Then why did you say it was done differently in your earlier post?
With reference to what? I note that your description of technical
support organizations and mine were independently in agreement.
More information about the freebsd-questions