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Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
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External HDD detected but not mounted.

January 12th, 2020, 4:41

Hello,
I have an external HDD and when I plugged it to my system then it is detected, but not mounted:
Code:
$ lsusb
Bus 002 Device 037: ID 125f:a15a A-DATA Technology Co., Ltd. DashDrive Durable HD710 portable HDD various size

And:
Code:
$ sudo fdisk -l
Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Disk model: STXXX
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: C40840DC-B308-4919-B387-E2BD0C61DD5F

Device         Start       End   Sectors   Size Type
/dev/sda1       2048   1368063   1366016   667M EFI System
/dev/sda2    1368064 177930239 176562176  84.2G Microsoft basic data
/dev/sda3  177930240 959180799 781250560 372.5G Microsoft basic data
/dev/sda4  959180800 976771071  17590272   8.4G Linux swap


Disk /dev/sdb: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Disk model: STXXX
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x00d600d6

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sdb1              63 419425019 419424957   200G  7 HPFS/NTFS/exFAT
/dev/sdb2       419425020 976773167 557348148 265.8G  7 HPFS/NTFS/exFAT

Partition 1 does not start on physical sector boundary.
Partition 2 does not start on physical sector boundary.

And:
Code:
$ dmesg | tail -n 17
[ 8235.103120] usb 2-7: new high-speed USB device number 66 using xhci_hcd
[ 8235.252558] usb 2-7: New USB device found, idVendor=125f, idProduct=a15a, bcdDevice= 1.00
[ 8235.252560] usb 2-7: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 8235.252561] usb 2-7: Product: HD710
[ 8235.252562] usb 2-7: Manufacturer: ADATA
[ 8235.252563] usb 2-7: SerialNumber: 04A28201002800000062
[ 8235.253482] usb-storage 2-7:1.0: USB Mass Storage device detected
[ 8235.253729] scsi host6: usb-storage 2-7:1.0
[ 8236.283962] scsi 6:0:0:0: Direct-Access     ADATA    HD710            0    PQ: 0 ANSI: 6
[ 8236.284680] sd 6:0:0:0: Attached scsi generic sg3 type 0
[ 8236.285699] sd 6:0:0:0: [sdc] Spinning up disk...

How can I access to the disk?

Thank you.

Re: External HDD detected but not mounted.

January 12th, 2020, 4:56

Have you tried removing from the ADATA enclosure and connecting directly to SATA interface?

Re: External HDD detected but not mounted.

January 12th, 2020, 7:42

You could try to connect it directly with SATA as labtech suggested.

If that is not possible or after connecting with SATA you can try to image the drive with dd_rescue:

Code:
dd_recue -d -n /dev/sdb /home/[yourusername]/imagefile.dd /home/username/imagefile.log


In case you have some bad sectors while imaging you can try to fill the gaps with

Code:
dd_recue -R /dev/sdb /home/[yourusername]/imagefile.dd /home/username/imagefile.log


Be aware you need 500GB free space in /home/[yourusername]/!
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