Comment 1 for bug 526524

I have the same problem.

This is the manual udisk command:

$ sudo /usr/lib/udisks/udisks-helper-drive-benchmark /dev/sda 0
udisks-helper-progress: 0.0
read_transfer_rate: offset 0 rate 50121963.552517
udisks-helper-progress: 0.000000
read_transfer_rate: offset 409821184 rate 50161531.921785
read_transfer_rate: offset 819642368 rate 50068291.105993
read_transfer_rate: offset 1229463552 rate 50186590.338347
read_transfer_rate: offset 1639284736 rate 50145967.676659
read_transfer_rate: offset 2049105920 rate 50103384.598795
Error seeking to position -1836040192 for (null): Invalid argument

$ sudo fdisk -l
Disk /dev/sda: 82.0 GB, 81964302336 bytes
255 heads, 63 sectors/track, 9964 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical / optimal IO): 512 bytes / 512 bytes
Disk identifier: 0x92899289
[...]

$ sudo hdparm -I /dev/sda

/dev/sda:

ATA device, with non-removable media
 Model Number: Maxtor 6Y080L0
 Serial Number: Y3JNVAEE
 Firmware Revision: YAR41VW0
Standards:
 Used: ATA/ATAPI-7 T13 1532D revision 0
 Supported: 7 6 5 4
Configuration:
 Logical max current
 cylinders 16383 16383
 heads 16 16
 sectors/track 63 63
 --
 CHS current addressable sectors: 16514064
 LBA user addressable sectors: 160086528
 LBA48 user addressable sectors: 160086528
 Logical/Physical Sector size: 512 bytes
 device size with M = 1024*1024: 78167 MBytes
 device size with M = 1000*1000: 81964 MBytes (81 GB)
 cache/buffer size = 2048 KBytes (type=DualPortCache)

Only work with USB stick. Benchmark fail with other HD.