When you export a physical disk slice, it appears in the guest domain as
a single-slice disk (format(1) shows "SUN-DiskSlice"). This is what you
see for c0d2 and c0d3. With a single-slice disk, you can only use slice 0
(e.g. c0d2s0 and c0d3s0).
But if you export a volume (either ZFS or SVM) then, by default, it
will appear
as a full disk image (format(1) shows "SUN-DiskImage"). In that case,
you can
use multiple partitions but you first have to create a partition table (with
format -> partition -> label). This is what you see for c0d4, c0d5, c0d6.
You currently get an error because no partition table was created so there's
no slice 0.
If you want to export a ZFS/SVM volume as a single-slice disk then you
need
to use "option=slice" in the "ldm add-vdsdev" command. I think this what you
are trying to achieve here.
Refer to the Admin Guide for more info, in particular:
http://download.oracle.com/docs/cd/E19608-01/html/821-1485/virtualdiskappearance.html
http://download.oracle.com/docs/cd/E19608-01/html/821-1485/virtualdiskbackendoptions.html#sliceoption
alex.
On 4/12/11 3:52 AM, Greg Earle wrote:
"Long-time listener, first time caller ... "
[Forgive me for the long post, it's mostly illustrative command outputs.]
On a T-5120 with 4 disks, I'm trying to use the 2nd set of disks (2x300
GB) in one of my client LDoms:
----------------------------------------------------------------------
miplt5120:1:623 [/root] # format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c1t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@0/pci@0/pci@2/scsi@0/sd@0,0
1. c1t1d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@0/pci@0/pci@2/scsi@0/sd@1,0
2. c1t2d0 <SUN300G cyl 46873 alt 2 hd 20 sec 625>
/pci@0/pci@0/pci@2/scsi@0/sd@2,0
3. c1t3d0 <SUN300G cyl 46873 alt 2 hd 20 sec 625>
/pci@0/pci@0/pci@2/scsi@0/sd@3,0
----------------------------------------------------------------------
Disks 2 and 3 are partitioned identically:
----------------------------------------------------------------------
Part Tag Flag Cylinders Size Blocks
0 unassigned wm 1 - 16777 100.00GB (16777/0/0) 209712500
1 unassigned wm 16778 - 33555 100.00GB (16778/0/0) 209725000
2 backup wu 0 - 46872 279.38GB (46873/0/0) 585912500
3 unassigned wm 33556 - 41944 50.00GB (8389/0/0) 104862500
4 unassigned wm 41945 - 46810 29.00GB (4866/0/0) 60825000
5 unassigned wm 0 0 (0/0/0) 0
6 unassigned wm 0 0 (0/0/0) 0
7 unassigned wm 46811 - 46872 378.42MB (62/0/0) 775000
----------------------------------------------------------------------
Here's how I'm exporting into the client LDom:
- c1t2d0s0 + c1t3d0s0 (d1); c1t2d0s3 + c1t3d0s3 (d1); and c1t2d0s4 +
c1t3d0s4 (d3) are all configured as 3 mirrored metadevices in Solaris
Volume Manager and then exported
- c1t2d0s1 and c1t3d0s1 are exported as 2 separate "raw" slices
- c1t2d0s7 and c1t3d0s7 are used for the SVM metadb databases
----------------------------------------------------------------------
devsuncontrol1:1:637 [/root] # ldm list-bindings primary
[...]
VDS
NAME VOLUME OPTIONS MPGROUP DEVICE
primary-vds0 dvd_vol /dev/rdsk/c0t0d0s2
[...]
c1t2d0s1 slice /dev/dsk/c1t2d0s1
c1t3d0s1 slice /dev/dsk/c1t3d0s1
db-dev-metadevice-d2 /dev/md/dsk/d2
db-dev-metadevice-d3 /dev/md/dsk/d3
db-dev-metadevice-d1 /dev/md/dsk/d1
CLIENT VOLUME
[...]
vdisk0@db-dev db-dev-vol0
vdisk1@db-dev c1t2d0s1
vdisk2@db-dev c1t3d0s1
vdisk4@db-dev db-dev-metadevice-d2
vdisk5@db-dev db-dev-metadevice-d3
vdisk3@db-dev db-dev-metadevice-d1
----------------------------------------------------------------------
This is for a database LDom; the idea is to create a mirrored ZFS zpool
from the 2 slices (for use by the database backups) and to create 3 UFS
filesystems on top of the 3 exported SVM metadevices for the actual
database.
The exported vdisks/slices are all seen just fine in the client LDom:
----------------------------------------------------------------------
db-dev:1:82 [/] # format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c0d0 <SUN-DiskImage-20GB cyl 566 alt 2 hd 96 sec 768>
/virtual-devices@100/channel-devices@200/disk@0 <=== system (v)disk
1. c0d2 <SUN-DiskSlice-100GB cyl 16780 alt 2 hd 20 sec 625>
/virtual-devices@100/channel-devices@200/disk@2
2. c0d3 <SUN-DiskSlice-100GB cyl 16780 alt 2 hd 20 sec 625>
/virtual-devices@100/channel-devices@200/disk@3
3. c0d4 <SUN-DiskImage-99GB cyl 2842 alt 2 hd 96 sec 768>
/virtual-devices@100/channel-devices@200/disk@4
4. c0d5 <SUN-DiskImage-50GB cyl 1420 alt 2 hd 96 sec 768>
/virtual-devices@100/channel-devices@200/disk@5
5. c0d6 <SUN-DiskImage-29GB cyl 822 alt 2 hd 96 sec 768>
/virtual-devices@100/channel-devices@200/disk@6
----------------------------------------------------------------------
But if I try to access either the exported slices or the 3 vdisks, I get
"I/O error":
----------------------------------------------------------------------
db-dev:1:83 [/] # newfs -m 3 -i 2048 /dev/dsk/c0d4s0
/dev/rdsk/c0d4s0: I/O error
db-dev:1:84 [/] # newfs -m 3 -i 2048 /dev/dsk/c0d5s0
/dev/rdsk/c0d5s0: I/O error
db-dev:1:85 [/] # newfs -m 3 -i 2048 /dev/dsk/c0d6s0
/dev/rdsk/c0d6s0: I/O error
db-dev:1:86 [/] # dd if=/dev/rdsk/c0d4s0 ibs=512 count=1
dd: /dev/rdsk/c0d4s0: open: I/O error
db-dev:1:87 [/] # dd if=/dev/rdsk/c0d5s0 ibs=512 count=1
dd: /dev/rdsk/c0d5s0: open: I/O error
db-dev:1:88 [/] # dd if=/dev/rdsk/c0d6s0 ibs=512 count=1
dd: /dev/rdsk/c0d6s0: open: I/O error
db-dev:1:89 [/] # zpool create -m /export/db_backups dbdump mirror
c0d2s0 c0d3s0
cannot create 'dbdump': one or more devices is currently unavailable
db-dev:1:90 [/] # zpool create -m /export/db_backups dbdump c0d2s0
cannot create 'dbdump': one or more devices is currently unavailable
db-dev:1:91 [/] # zpool create -m /export/db_backups dbdump c0d3s0
cannot create 'dbdump': I/O error
db-dev:1:92 [/] # dd if=/dev/rdsk/c0d3s0 ibs=8k count=3 | strings -
K+*4
version
name
dbdump
state
pool_guid
hostid
hostname
db-dev
top_guid
guid
vdev_tree
type
disk
guid
path
3+0 records in
48+0 records out
/dev/dsk/c0d3s0
phys_path
1/virtual-devices@100/channel-devices@200/disk@3:a
whole_disk
metaslab_array
metaslab_shift
ashift
asize
is_log
create_txg
----------------------------------------------------------------------
I don't get it. I'm using slice 0 (starting at cylinder 1) in both the
control LDom as well as when I try to reference the vdisks in the client
LDom, but I still get "I/O error". I can't even access the exported SVM
mirrored metadevices at the raw disk level.
1 of the 3 metadevices in the control LDom is still doing a resync, but
the other 2 aren't and of course the slices have nothing to do with that.
Am I overlooking something obvious?
Thanks in advance,
- Greg
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