[Gllug] the joy of SCSI

[Nix]

/dev/sda:
 Timing buffered disk reads:   70 MB in  3.07 seconds =  22.80 MB/sec

/dev/sdb:
 Timing buffered disk reads:   70 MB in  3.00 seconds =  23.33 MB/sec

Then, quietly the syslog murmurs

Feb 25 16:17:56 loki warning: kernel: sym0: SCSI parity error detected: SCR1=132 DBC=50000000 SBCL=0
Feb 25 16:17:56 loki warning: kernel: sym0:2: ERROR (81:0) (8-0-0) (10/9d/0) @ (mem c2800038:ffffffff).
Feb 25 16:17:56 loki warning: kernel: sym0: regdump: da 00 00 9d 47 10 02 0e 00 08 82 00 80 00 0f 0a 30 a6 3d 01 02 ff ff ff.
Feb 25 16:17:56 loki warning: kernel: sym0: SCSI BUS reset detected.
Feb 25 16:17:56 loki notice: kernel: sym0: SCSI BUS has been reset.

/dev/sda:
 Timing buffered disk reads:   6.2 MB in  3.03 seconds =  2.04 MB/sec

/dev/sdb:
 Timing buffered disk reads:   14.5 MB in  3.00 seconds =  4.84 MB/sec

Gee, thanks, SCSI layer. One stupid parity error ON A HOST I DON'T EVEN
HAVE ATTACHED and you divide the disk speed by ten.

(The adapter is on ID 11; the disks on 0 and 1. There's nothing on
8:0:0.)

I guess it's a transient cable problem (odd, the cable is a SCSI III
160Mb/s cable and I'm chucking 40Mb/s over it at most). But this isn't
a very nice way to respond to a transient cable problem, really.
I mean I didn't even know you could *make* SCSI buses run that slowly.

-- 
`... follow the bouncing internment camps.' --- Peter da Silva
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