Multipathing I/O on Solaris is certainly an interesting topic ...
A quick start : http://www.petertribble.co.uk/Solaris/mpxio.html
More at : http://hub.opensolaris.org/bin/view/Project+mpxio/WebHome
And the original documentation :
http://download.oracle.com/docs/cd/E19957-01/819-0139/
Best regards
-benoit
Edward Ned Harvey wrote:
Can anyone explain why this is, or needs to be?
In some systems, disks are named c0t0d0 etc
In some systems, they're named like this: c0t5000C5003424396Bd0
Worse yet...
In my present system,
foo=5000C5003424396B
bar=600C0FF000000000092C4D22A708D800
when I run format, I see c0t${foo}d0
If I ls /dev/rdsk/c0t${foo}* I see all the usual suspects... p0 to p4,
and s0 to s15 ... But I don't see any "d0" without any "p" or "s"
If I ls /dev/rdsk/*d0 then I see $bar
Here's why I care:
I installed s11e to a partition of a 2T drive. Now I want to mirror
it, so I want to replicate the fdisk partitions & partition slices
onto the 2nd disk... Nothing I do inside of "format" seems to make
them identical, so I considered using a low-level dd copy of the raw
disk, but the device name for the raw disk doesn't exist (nothing
/dev/rdsk/*d0 matching the name of the disk in my zpool), unless it's
one of those other $bar things... In which case I don't know which
one is which. I have a 50/50 chance of doing it right, or destroying
the original. That's all assuming it's even valid to attempt doing
such a thing.
Right now, the only technique I can think of that will work is ...
I'll ignore the partition&slice tables on the original disk, and
create a new fdisk partition & partition slice scheme on the 2nd disk
as I wish. Then I'll zfs send the rpool onto the 2nd disk, install
grub etc, and wipe out the first disk. Boot from the 2nd disk. Then
re-partition the first disk the same as the 2nd disk and start
mirroring. This sounds like a pointless hassle that must be avoidable
SOME how.
;-) Thanks for any answers/info/suggestions.
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