[Libguestfs] [PATCH] New tool: virt-format

[Török Edwin]

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