Re: [Libguestfs] [PATCH] New tool: virt-format
On 01/18/2012 03:12 PM, Paolo Bonzini wrote:
On 01/17/2012 07:19 PM, Török Edwin wrote:
>
>> I don't know if it is possible to
>> pass the SSD erase block size up through the virt stack.
>
> I was thinking more about a command-line flag to specify alignment.
> My SSD reports 512 bytes as both logical and physical sector size, and
> thats a physical drive.
> Only my HDD reports a 4096 physical sector size (512 logical).
What do you have for the SSD in /sys/block/sda/discard_alignment?
# cat /sys/block/sdg/discard_alignment
0
# hdparm -I /dev/sdg
/dev/sdg:
ATA device, with non-removable media
Model Number: OCZ-VERTEX2
Serial Number: OCZ-RWK816SY5C086YHS
Firmware Revision: 1.35
Transport: Serial
Standards:
Used: unknown (minor revision code 0x0028)
Supported: 8 7 6 5
Likely used: 8
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 175836528
LBA48 user addressable sectors: 175836528
Logical Sector size: 512 bytes
Physical Sector size: 512 bytes
Logical Sector-0 offset: 0 bytes
device size with M = 1024*1024: 85857 MBytes
device size with M = 1000*1000: 90028 MBytes (90 GB)
cache/buffer size = unknown
Nominal Media Rotation Rate: Solid State Device
Best regards,
--Edwin