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Date: Wed, 28 May 1997 13:11:39 -0700 (PDT)
From: Jaye Mathisen  <mrcpu@cdsnet.net>
To: scsi@freebsd.org, hackers@freebsd.org
Subject: More ahc0 driver problems.
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# uname -a
FreeBSD yyy.cdsnet.net 2.2.2-RELEASE FreeBSD 2.2.2-RELEASE #0: Fri May 26
22:27:17 PDT 1995     root@yyy.cdsnet.net:/usr/src/sys/compile/SCHIZO2
i386


Under bonnie to a ccd of sd2, sd3 (WD 4.1GB Enterprise drives):

# bonnie -s 1000
File './Bonnie.333', size: 1048576000
Writing with putc()...May 28 13:08:12 yyy /kernel: sd4(ahc2:1:0): SCB 0x2
- timed out while idle, LASTPHASE == 0x1, SCSISIGI == 0xe6
May 28 13:08:12 yyy /kernel: sd4(ahc2:1:0): SCB 0x2 - timed out while
idle, LASTPHASE == 0x1, SCSISIGI == 0xe6
May 28 13:08:12 yyy /kernel: SEQADDR = 0x4 SCSISEQ = 0x12 SSTAT0 = 0x27
SSTAT1 = 0xb
May 28 13:08:12 yyy /kernel: SEQADDR = 0x4 SCSISEQ = 0x12 SSTAT0 = 0x27
SSTAT1 = 0xb
May 28 13:08:12 yyy /kernel: Ordered Tag queued
May 28 13:08:12 yyy /kernel: Ordered Tag queued
May 28 13:08:12 yyy /kernel: Ordered Tag sent
May 28 13:08:12 yyy /kernel: Ordered Tag sent
May 28 13:08:12 yyy /kernel: sd4(ahc2:1:0): no longer in timeout
May 28 13:08:12 yyy /kernel: sd4(ahc2:1:0): no longer in timeout
May 28 13:08:22 yyy /kernel: sd4(ahc2:1:0): SCB 0x3 - timed out while
idle, LASTPHASE == 0x1, SCSISIGI == 0xe6
May 28 13:08:22 yyy /kernel: sd4(ahc2:1:0): SCB 0x3 - timed out while
idle, LAST


Reams and reams of them.  WHen it gets to the rewriting phase, it quiets
down.

How do I turn on write caching in my drive?  I assume I have to edit some
mode page, but heck if I know which one.