[nycbug-talk] FreeBSD SATA Raid Controllers
matador-gtabug at matadorsplace.com
Thu Sep 9 15:16:27 EDT 2004
I have a decent one from Adaptec powering my web server.
Its nice to be able to have a hardware RAID card. Meaning, when you put
in the 5.x CD, and choose install partition, it comes up as -- /dev/aacd0*
Filesystem Size Used Avail Capacity Mounted on
/dev/aacd0s1a 117M 71M 37M 66% /
That's 2 * 80 GByte in a RAID-1 configuration.
When I first tried the card -- when it wasnt in the 2U rackmount at 25
Broadway it is now -- I left the side of the ATX case open.
I then pulled one of the SATA cables from a 80gb.
Of course, top was still running, everything was going ok. Nothing
stopped, all is good :)
I then burst into a evil laugh, and proclaimed "BSD owns me"
Then I rebooted, and put back the cable while everything was still running.
Upon reboot, I went into Adaptec's BIOS ; and looked at status, and saw it
rebuilding on the drive I reconnected.
I got out, and BSD booted of course.
Then for fun, I pulled first sata cable, and everything was running. I
rebooted, and nothing booted.
This is obviously because it was still rebuilding, and within those few
minutes, I pulled the drive it was building from.
Total loss of data.
Also, within the bios, you can specify a spare. So if you have a RAID-1
set like I had. You can connect a 3rd drive, and tell it to use it in the
event of a castrophy.
I paid ~CDN$475 for the card with taxes. So ~$355 USD at 0.75 exchange.
I will for sure use this card in future servers I build.
> Hi All,
> I found sparse info online, but wanted to know if anyone had any
> experience with 4 channel SATA Raid Controllers on FreeBSD? I want to
> make sure that atacontrol(8) would work for live raid rebuilds etc...
> Thanks for any info or urls...
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