Corrupt GPT header on disk from twa array - fixable?

[Alban Hertroys]

On Jun 2, 2013, at 16:12, Kimmo Paasiala <kpaasial at gmail.com> wrote:
> 
> Looking at the gpart(8) output it seems that only 20GBs of the disk is
> recognized by the disk driver but the GPT table still shows the full
> capacity 910GB. I'd say that the GPT table is in fact correct and if
> you can somehow get the disks to be recognized with full capacity they
> should be usable as they are. What does dmesg(8) say about the disks?

From dmesg:

ada2 at ahcich2 bus 0 scbus2 target 0 lun 0
ada2: usb_alloc_device: set address 2 failed (USB_ERR_IOERROR, ignored)
<ST3500418AS CC34> ATA-8 SATA 2.x device
usbd_setup_device_desc: getting device descriptor at addr 2 failed, USB_ERR_IOERROR
ada2: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada2: Command Queueing enabled
ada2: 476940MB (976773168 512 byte sectors: 16H 63S/T 16383C)
ada2: Previously was known as ad8
ada3 at ahcich3 bus 0 scbus3 target 0 lun 0
ada3: <ST3500418AS CC34> ATA-8 SATA 2.x device
ada3: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada3: Command Queueing enabled
ada3: 476940MB (976773168 512 byte sectors: 16H 63S/T 16383C)
ada3: Previously was known as ad10
ada4 at ahcich4 bus 0 scbus4 target 0 lun 0
ada4: <Hitachi HDS721010CLA332 JP4OA39C> ATA-8 SATA 2.x device
usbd_req_re_enumerate: addr=2, set address failed! (USB_ERR_IOERROR, ignored)
ada4: 300.000MB/s transfers (SATA 2.x, usbd_setup_device_desc: getting device descriptor at addr 2 failed, USB_ERR_IOERROR
UDMA6, PIO 8192bytes)
ada4: Command Queueing enabled
ada4: 953869MB (1953525168 512 byte sectors: 16H 63S/T 16383C)
ada4: Previously was known as ad12
ada5 at ahcich5 bus 0 scbus5 target 0 lun 0
ada5: <WDC WD1002FAEX-00Z3A0 05.01D05> ATA-8 SATA 3.x device
ada5: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
ada5: Command Queueing enabled
ada5: 953869MB (1953525168 512 byte sectors: 16H 63S/T 16383C)
ada5: Previously was known as ad14
SMP: AP CPU #1 Launched!
Timecounter "TSC-low" frequency 13371081 Hz quality 800
GEOM: ada2: the secondary GPT header is not in the last LBA.
GEOM: ada3: the secondary GPT header is not in the last LBA.
GEOM_MIRROR: Device mirror/boot launched (2/2).
GEOM_MIRROR: Device mirror/swap launched (2/2).
GEOM_MIRROR: Device mirror/root launched (2/2).
GEOM: ada4: the secondary GPT header is not in the last LBA.
GEOM: ada5: the secondary GPT header is not in the last LBA.

Alban Hertroys
--
If you can't see the forest for the trees,
cut the trees and you'll find there is no forest.