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From: Lauri Laupmaa <mauri@silicium.ee>
Date: Thu, 27 Jan 2005 13:55:39 +0200
To: =?ISO-8859-1?Q?Michel_B=E9langer?= <michel.belanger@mediom.qc.ca>
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Subject: Re: RAID CARD
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On Jan 26, 2005, at 10:07 PM, Michel B=E9langer wrote:

> would be best. People proposed me ADAPTEC 2120S U320  and others=20
> suggested
> Intel SRCU42L. Wich one is best supported with Freebsd 5.3

I can only comment on Adaptec 2120S, because I have a number of those,=20=

both in 4.x and 5.x servers.
At first I very much loved those cards, but after some lockups started=20=

to be suspicious.
What I have found is that sometimes those systems just stops serving=20
disk requests. If there is active ssh connection in time of hang, then=20=

I can switch screens with ctrl-a (/usr/ports/misc/screen). But when=20
doing whatever accessing disks then terminal hangs. No relevant=20
messages in logs. There are no successful recovery from this state.=20
Only power/reset switch.

All the servers have 3 or 4 disks configured as RAID5, they have=20
different motherboards and disk drives.
One of them (4.9-STABLE) was running fine for years and started hanging=20=

after 2120S install. I just moved filesystems to RAID.

I cannot imagine how this can be related, but those hangs seem to=20
coincide with /var filling up.

L.=