[OpenIndiana-discuss] find size of raw disks

[Harry Putnam]

McBofh <james.c.mcpherson at gmail.com> writes:

> On 22/11/10 01:44 PM, Harry Putnam wrote:
>> Is there some way to determine the size of disks discovered with
>> `format'
>>
>> An attempt to create a 2 disk mirror failed with the message that the
>> disks were different sizes, but I thought they were the same size... I
>> must have used the wrong identifier for one of the disks... so to find
>> the matching disk how can I tell what size the discs turned up by
>> format are?
>
>
>
> $ pfexec format
> Searching for disks...done
>
>
> AVAILABLE DISK SELECTIONS:
>        0. c3t4d0 <ATA    -ST3320620AS    -D    cyl 38910 alt 2 hd 255 sec 63>
>           /pci at 0,0/pci10de,376 at a/pci1000,3150 at 0/sd at 4,0
>        1. c3t6d0 <ATA    -ST3320620AS    -K    cyl 38910 alt 2 hd 255 sec 63>
>           /pci at 0,0/pci10de,376 at a/pci1000,3150 at 0/sd at 6,0
>        2. c5t5000C500204C9482d0 <ATA    -ST31000528AS   -CC38 cyl 60797 alt 2 hd 255 sec 126>
>           /scsi_vhci/disk at g5000c500204c9482
>        3. c5t5000C500205E77DBd0 <ATA    -ST31000528AS   -CC38 cyl 60797 alt 2 hd 255 sec 126>
>           /scsi_vhci/disk at g5000c500205e77db
>        4. c5t5000CCA35DE9C580d0 <ATA    -Hitachi HDS7210-A3EA cyl 60797 alt 2 hd 255 sec 126>
>           /scsi_vhci/disk at g5000cca35de9c580
>        5. c5t5000CCA35DEA1ED5d0 <ATA    -Hitachi HDS7210-A3EA cyl 60797 alt 2 hd 255 sec 126>
>           /scsi_vhci/disk at g5000cca35dea1ed5
>        6. c5t5000CCA00510A7CCd0 <HITACHI-HUS1514SBSUN146-SA02 cyl 17826 alt 2 hd 255 sec 63>
>           /scsi_vhci/disk at g5000cca00510a7cc
>        7. c5t50024E90037AF38Cd0 <ATA    -SAMSUNG HD103SJ-0001 cyl 60797 alt 2 hd 255 sec 126>
>           /scsi_vhci/disk at g50024e90037af38c
>        8. c5t50024E90037AF390d0 <ATA    -SAMSUNG HD103SJ-0001 cyl 60797 alt 2 hd 255 sec 126>
>           /scsi_vhci/disk at g50024e90037af390
>        9. c6t0d0 <drive type unknown>
>           /pci at 0,0/pci108e,6676 at 2,1/hub at 6/hub at 1/storage at 1/disk at 0,0
>       10. c6t0d1 <drive type unknown>
>           /pci at 0,0/pci108e,6676 at 2,1/hub at 6/hub at 1/storage at 1/disk at 0,1
>
>
>
> It's mostly the cylinder numbers that you need to watch out for.
> If you have devices with the same claimed manufacturer size but
> different geometry, I'd create a slice of the maximum size on the
> smaller disk, then create a slice with the same number of cylinders
> on the larger disk, and then mirror those two slices.

Thanks... very helpful.  I noticed though that once a disk is formatted
or put into a zpool the cyl no. is no longer given, but then the size
is shown

I did also find a diffeent answer too.

`iostat -En '  Appears to give both the names and the sizes.  But
not sure it would still be useful in the case you describe.