RAID CARD

[Lauri Laupmaa]

On Jan 26, 2005, at 10:07 PM, Michel Bélanger wrote:

> would be best. People proposed me ADAPTEC 2120S U320  and others 
> 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, 
both in 4.x and 5.x servers.
At first I very much loved those cards, but after some lockups started 
to be suspicious.
What I have found is that sometimes those systems just stops serving 
disk requests. If there is active ssh connection in time of hang, then 
I can switch screens with ctrl-a (/usr/ports/misc/screen). But when 
doing whatever accessing disks then terminal hangs. No relevant 
messages in logs. There are no successful recovery from this state. 
Only power/reset switch.

All the servers have 3 or 4 disks configured as RAID5, they have 
different motherboards and disk drives.
One of them (4.9-STABLE) was running fine for years and started hanging 
after 2120S install. I just moved filesystems to RAID.

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

L.