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Date:      Tue, 04 Apr 2000 15:00:52 +0400
From:      Sergei Vyshenski <svysh@pn.sinp.msu.ru>
To:        freebsd-stable@FreeBSD.ORG
Subject:   ata sad combinatorics
Message-ID:  <3.0.5.32.20000404150052.007c4710@vivaldi>

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Fresh (and identical) 4.0-stable systems with support 
for ata0 and ata1 were tried at:
(A) Intel-586 box
(B) Intel-686 box

Tested were 3 large IDE disks:
(1) - fully occupied by FreeBSD
(2) and (3) - first half occupied by Win98, second by FreeBSD

**Box (A): 
Ok with any disk as ad0.
Ok with any disk as ad0 and any other as ad1.
(2) as first master and (3) as second master are ok when
booted under Win98.
Any disk as ad0 and any other as ad2 under FreeBSD:
 as soon as I try to mount something from the ad2, I see
 continuos chain of complains:

ad2: READ command timeout -resetting
ata1: resetting devices done
ata1-master: WARNING: WAIT_READY active=ATA_ACTIVE_ATA
...

**Box (B):
Ok with any combination of disks.

If bios of (A) should be considered too old, then why 
Win98 gives more successful combinations, than FreeBSD?
Note that second large master IS understood by Win98,
but is NOT understood by FreeBSD (even if it has only ufs
partitions).




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