Recovery from external drive which uses 4096 sector size
Posted: 30 Jun 2020, 18:27
A friend has asked me for help with a Seagate USB drive (Model SRD00F2) which failed after water damage.
I've extracted the internal 3½ inch (5TB) disk, and Hard Disk Sentinel gives it 100% perfect SMART scores when mounted via its SATA connectors. But Windows 10 reports:
This links seems to describe the issue: I'd like to try Testdisk, which I've used some time ago successfully, but I'm wary of doing anything which will write to the disk in case it makes later recovery attempts more difficult. I note there is an option to set sector size within Testdisk. Is it safe to do this? (Perhaps the change is made within the running executable rather than being written to the disk?) I'm at the limit of my (very patchy) knowledge, so any help anyone can offer will be gratefully appreciated.
Philip Herlihy, London.
I've extracted the internal 3½ inch (5TB) disk, and Hard Disk Sentinel gives it 100% perfect SMART scores when mounted via its SATA connectors. But Windows 10 reports:
It's the USB adaptor circuitry which seems to have failed. I understand that these models of disk translate the standard 512 sector size "on the fly" to 4096 to allow XP to access large disks, but without the adapter I can't "see" the filesystem. I tried Seagate's own recovery utility, but while it detects files and can determine their type, it doesn't provide names or folder structure.The partition(s) on this hard disk created with 4 K physical sector size, but the current physical sector Size is 512 bytes:
Disk: STSDDODMDDO- 1 FKI 78 tW4JODGKZ)
It IS recommended to re-connect the hard disk as previously connected (probably
with different USB adapter, enclosure, docking station or so) to access
the partition with all stored data - otherwise data loss may occur.
This links seems to describe the issue: I'd like to try Testdisk, which I've used some time ago successfully, but I'm wary of doing anything which will write to the disk in case it makes later recovery attempts more difficult. I note there is an option to set sector size within Testdisk. Is it safe to do this? (Perhaps the change is made within the running executable rather than being written to the disk?) I'm at the limit of my (very patchy) knowledge, so any help anyone can offer will be gratefully appreciated.
Philip Herlihy, London.