On 2017-08-06 21:15, L A Walsh wrote:

...

I purchased a 4TB Seagate Backup Plus hard drive. FWIW, the backup+ drives have 4K sectors and no "512e" (emulated) compatibility. MS OS's before Win8 don't recognize it for many

don fisher wrote: purposes, including boot and MS-backup+restore (great feature for a backup+ drive!).

They were "designed"[?] for backup only.

Note -- some larger drives, especially ones sold for backing surveillance camera's are not designed to work as general purpose disks because they take 2x as long to write as normal disks (they need to write 2 tracks in order to store 1). I haven't heard of any backup disks like that, but I wouldn't be surprised if some were sold where only the fine print indicated additional write costs.

Ah... And you think this is a backup drive? There is a very peculiar info in fdisk output: Disk /dev/sda: 3.7 TiB, 4000787029504 bytes, 7814037167 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 33553920 bytes <======= Disklabel type: gpt My "normal" disks have (the only line that is different): I/O size (minimum/optimal): 4096 bytes / 4096 bytes Maybe that indicates it is a data only disk. Write in 33MB chunks... But it does have 512 bytes emulated sectors.

Since the only 4T disks I have are 512e, I can't really test it out.

FWIW -- the term "miscrosoft basic data" with a GUID of EBD0A0A2-B9E5-4433-87C0-68B6B72699C7.

Linux used to use that same GUID to describe any "Basic Data Parition" until MS took it over. Since then linux uses a Linux Specific Data Partition GUID of 0FC63DAF-8483-4772-8E79-3D69D8477DE4.

But not all Linuxes; openSUSE, at least till leap 42.2, doesn't. I have disks partitioned by gparted or yast that show that "microsoft basic data" label.

-l

*permission to quote in full on any list is granted by the author*

-- Cheers / Saludos, Carlos E. R. (from 42.2 x86_64 "Malachite" at Telcontar)