On 06/23/2015 08:16 PM, Konstantin Svist wrote:
On 06/23/2015 03:04 PM, jd1008 wrote:
during secure erase, I am seeing these continuous rolling errors
in /var/log/messages
Jun 23 16:00:37 localhost kernel: ata6.00: error: { ABRT }
Jun 23 16:00:37 localhost kernel: ata6.00: configured for UDMA/100
Jun 23 16:00:37 localhost kernel: ata6: EH complete
Jun 23 16:00:37 localhost kernel: ata6.00: exception Emask 0x0 SAct
0x0 SErr 0x0 action 0x0
Jun 23 16:00:37 localhost kernel: ata6.00: irq_stat 0x00060002, device
error via D2H FIS
Jun 23 16:00:37 localhost kernel: ata6.00: failed command: WRITE DMA EXT
Jun 23 16:00:37 localhost kernel: ata6.00: cmd
35/00:00:b0:b5:47/00:04:02:00:00/e0 tag 0 dma 524288 out
res 51/04:00:b0:b5:47/00:04:02:00:00/e0 Emask 0x1 (device error)
Jun 23 16:00:37 localhost kernel: ata6.00: status: { DRDY ERR }
Jun 23 16:00:37 localhost kernel: ata6.00: error: { ABRT }
Jun 23 16:00:37 localhost kernel: ata6.00: configured for UDMA/100
Jun 23 16:00:37 localhost kernel: sd 6:0:0:0: [sdc]
Jun 23 16:00:37 localhost kernel: Result: hostbyte=DID_OK
driverbyte=DRIVER_SENSE
Jun 23 16:00:37 localhost kernel: sd 6:0:0:0: [sdc]
Jun 23 16:00:37 localhost kernel: Sense Key : Aborted Command
[current] [descriptor]
Jun 23 16:00:37 localhost kernel: Descriptor sense data with sense
descriptors (in hex):
Jun 23 16:00:37 localhost kernel: 72 0b 00 00 00 00 00 0c 00 0a
80 00 00 00 00 00
Jun 23 16:00:37 localhost kernel: 02 47 b5 b0
Jun 23 16:00:37 localhost kernel: sd 6:0:0:0: [sdc]
Jun 23 16:00:37 localhost kernel: Add. Sense: No additional sense
information
Jun 23 16:00:37 localhost kernel: sd 6:0:0:0: [sdc] CDB:
Jun 23 16:00:37 localhost kernel: Write(10): 2a 00 02 47 b5 b0 00 04
00 00
Jun 23 16:00:37 localhost kernel: end_request: I/O error, dev sdc,
sector 38254000
Jun 23 16:00:37 localhost kernel: ata6: EH complete
Jun 23 16:00:37 localhost kernel: ata6.00: exception Emask 0x0 SAct
0x0 SErr 0x0 action 0x0
Jun 23 16:00:37 localhost kernel: ata6.00: irq_stat 0x00060002, device
error via D2H FIS
Jun 23 16:00:37 localhost kernel: ata6.00: failed command: WRITE DMA EXT
Jun 23 16:00:37 localhost kernel: ata6.00: cmd
35/00:00:b0:b9:47/00:04:02:00:00/e0 tag 0 dma 524288 out
res 51/04:00:b0:b9:47/00:04:02:00:00/e0 Emask 0x1 (device error)
Jun 23 16:00:37 localhost kernel: ata6.00: status: { DRDY ERR }
Jun 23 16:00:37 localhost kernel: ata6.00: error: { ABRT }
So, then, the drive is DeD dead ????
Sector 38254000is dead. Possibly some others, too...
You can continue secure erase (assuming the erase program can ignore the
error), but you're not guaranteed that the data will be wiped from dead
sectors.
It's very hard to retrieve data from those, but may be possible with
specialized equipment.
If you're wiping mostly for privacy and there are few dead sectors,
you're probably fine. If you have very sensitive data and/or many bad
sectors, you need to take extra measures to destroy the data.
HTH
I will be resorting to a powerfull de-gausser :)
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