Adding an 8-slot backplane/controller set to an E450
2007-12-24 19:04:00
filesystem layout and RAID strategy for an E450 marked for firewall
service. However, I was hoping to wait until I had performmed a
successful setup based on the wonderful advice I was given in order to
provide a more complete, verifiable, and useful summary. In the meantime,
most sadly, I have been tasked by another obstacle : [insert subject
line].
I was told in no uncertain terms that mirroring would not protect my
drives from a controller-related failure or corruption if the drives were
all attached to a single controller. Having the mirroring disks
physically separated (masters on one controller, mirrors on the other)
provides this desired protection. I took another gander at the
450 and noticed that the cheapskates did not order the two optional 8-slot
expansion kits (it comes with a 4-slot backplane). Luckily, however I
found another 450 that was more righteously armed, and horked an 8-slot
backplane, a controller card, and extra cabling - from my reading, this
appears to comprise the complete contents of the kit.
I screwed in the lower backplane and controller, and attached all the
power and I2C cables. I double, triple, quadruple checked that I had
everything set per the installation instructions (450 owners guide : "How
to Install the 8-Bay Storage Expansion Option").
After popping drives in disk slots 4 & 5 for a new cadre of six disks
(you're not supposed to skip slot numbers), I did the following:
1. Powered the machine
2. Hit Stop-A at the banner
3. Ran the following commands:
*ok* setenv disk-led-assoc 0 1 2
*ok* reset
<waited for banner again>
*ok* boot -r
4. OpenBoot: 'probe-scsi' and 'show-devs' showed only four drives
5. Shell: 'prtconf -v' showed nothing
6. More Shell: ran 'disks' and 'drvconfig' to no seen benefit
I tried a few other things too, but at the moment the specifics of that
endeavor defy my conscious (I left hastily and in disgust on Friday). I
think maybe I just did a bunch of 'man -k' runs, grasping at straws, and
useless gawking at the /dev/dsk directory. Any help, pointers, bagel
coupons, whatever would again be appreciated.
Thanks everyone
--Greg
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