Hello,
A question on putting ZFS on EMC pseuo-devices:
I have a T1000 where we were given 100 GB of SAN space from EMC:
# format < /dev/null
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c0t0d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/[EMAIL PROTECTED]/[EMAIL PROTECTED]/[EMAIL PROTECTED]/[EMAIL
PROTECTED]/[EMAIL PROTECTED],0
1. c0t1d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/[EMAIL PROTECTED]/[EMAIL PROTECTED]/[EMAIL PROTECTED]/[EMAIL
PROTECTED]/[EMAIL PROTECTED],0
2. c1t5006016030602568d0 <DGC-RAID5-0219 cyl 51198 alt 2 hd 256 sec
16>
/[EMAIL PROTECTED]/[EMAIL PROTECTED]/[EMAIL PROTECTED],0/[EMAIL
PROTECTED],0
3. c1t5006016830602568d0 <DGC-RAID5-0219 cyl 51198 alt 2 hd 256 sec
16>
/[EMAIL PROTECTED]/[EMAIL PROTECTED]/[EMAIL PROTECTED],0/[EMAIL
PROTECTED],0
4. emcpower0a <DGC-RAID5-0219 cyl 51198 alt 2 hd 256 sec 16>
/pseudo/[EMAIL PROTECTED]
Specify disk (enter its number):
# powermt display dev=all
Pseudo name=emcpower0a
CLARiiON ID=APM00052300875 [.HOSTNAME.]
Logical device ID=60060160B1221300084781BEAFAADD11 [LUN 87]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A Array failover mode: 1
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats
---
### HW Path I/O Paths Interf. Mode State Q-IOs
Errors
==============================================================================
3073 [EMAIL PROTECTED]/[EMAIL PROTECTED]/[EMAIL PROTECTED],0
c1t5006016030602568d0s0 SP A0 active
alive 0 0
3073 [EMAIL PROTECTED]/[EMAIL PROTECTED]/[EMAIL PROTECTED],0
c1t5006016830602568d0s0 SP B0 active
alive 0 0
When I tried to create a pool on the straight device I got an error:
# zpool create ldom-sparc-111 emcpower0a
cannot open '/dev/dsk/emcpower0a': I/O error
# zpool create ldom-sparc-111 emcpower0a
[...]
open("/dev/zfs", O_RDWR) = 3
open("/etc/mnttab", O_RDONLY) = 4
open("/etc/dfs/sharetab", O_RDONLY) Err#2 ENOENT
stat64("/dev/dsk/emcpower0as2", 0xFFBFB2D8) Err#2 ENOENT
stat64("/dev/dsk/emcpower0a", 0xFFBFB2D8) = 0
brk(0x000B2000) = 0
open("/dev/dsk/emcpower0a", O_RDONLY) Err#5 EIO
fstat64(2, 0xFFBF9F90) = 0
cannot open 'write(2, " c a n n o t o p e n ".., 13) = 13
/dev/dsk/emcpower0awrite(2, " / d e v / d s k / e m c".., 19) = 19
': write(2, " ' : ", 3) = 3
I/O errorwrite(2, " I / O e r r o r", 9) = 9
write(2, "\n", 1) = 1
close(3) = 0
llseek(4, 0, SEEK_CUR) = 0
close(4) = 0
brk(0x000C2000) = 0
_exit(1)
I then put a label on it, and things work fine:
Current partition table (original):
Total disk cylinders available: 51198 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 usr wm 0 - 51174 99.95GB (51175/0/0) 209612800
1 unassigned wu 0 0 (0/0/0) 0
2 backup wu 0 - 51197 100.00GB (51198/0/0) 209707008
3 unassigned wm 0 0 (0/0/0) 0
4 unassigned wm 0 0 (0/0/0) 0
5 unassigned wm 0 0 (0/0/0) 0
6 unassigned wm 0 0 (0/0/0) 0
7 unassigned wm 0 0 (0/0/0) 0
# zpool status
pool: ldom-sparc-111
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
ldom-sparc-111 ONLINE 0 0 0
emcpower0a ONLINE 0 0 0
errors: No known data errors
We have another T1000 with SAN space as well, and I don't remember having
to label the disk (though I could be mis-remembering):
Total disk sectors available: 524271582 + 16384 (reserved sectors)
Part Tag Flag First Sector Size Last Sector
0 usr wm 34 249.99GB 524271582
1 unassigned wm 0 0 0
2 unassigned wm 0 0 0
3 unassigned wm 0 0 0
4 unassigned wm 0 0 0
5 unassigned wm 0 0 0
6 unassigned wm 0 0 0
8 reserved wm 524271583 8.00MB 524287966
# zpool status
pool: ldom-sparc-110
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
ldom-sparc-110 ONLINE 0 0 0
emcpower0a ONLINE 0 0 0
errors: No known data errors
Any way to find out why there are differences?
Thanks for any info.
--
David Magda <dmagda at ee.ryerson.ca>
Vimes pulled out his watch and stared at it. It was turning out to be one
of those days...the sort that you got every day.
-- Terry Pratchett, _The_Fifth_Elephant_
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