Hi all,
just after sending a message to sunmanagers I realized that my question
should rather have gone here. So sunmanagers please excus ethe double
post:
I have inherited a X4140 (8 SAS slots) and have just setup the system
with Solaris 10 09. I first setup the system on a mirrored pool over
the first two disks
pool: rpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t0d0s0 ONLINE 0 0 0
c1t1d0s0 ONLINE 0 0 0
errors: No known data errors
and then tried to add the second pair of disks to this pool which did
not work (famous error message reagding label, root pool BIOS issue). I
therefore simply created an additional pool tank.
pool: rpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t0d0s0 ONLINE 0 0 0
c1t1d0s0 ONLINE 0 0 0
errors: No known data errors
pool: tank
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t2d0 ONLINE 0 0 0
c1t3d0 ONLINE 0 0 0
errors: No known data errors
So far so good. I have now replaced the last two SAS disks with 32GB
SSDs and am wondering how to add these to the system. I googled a lot
for best practise but found nothing so far that made me any wiser. My
current approach still is to simply do
zpool add tank mirror c0t6d0 c0t7d0
as I would do with normal disks but I am wondering whether that's the
right approach to significantly increase system performance. Will ZFS
automatically use these SSDs and optimize accesses to tank? Probably!
But it won't optimize accesses to rpool of course. Not sure whether I
need that or should look for that. Should I try to get all disks into
rpool inspite of the BIOS label issue so that SSDs are used for all
accesses to the disk system?
Hints (best practises) are greatly appreciated?
Thanks a lot,
Andreas
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