Two odd failures on a 750 XT
I have a 750 XT and it's had two failures. The first could be corrected. The second is waiting for a replacement.
The first failure was very odd - Apple support had no idea what was going on. The desktop Macintosh HD icon was showing more space available than the capacity of the disk, but disk utility showed the correct free space. Disk Utility reported no problems. I made a full backup, repartitioned, zeroed out the disk with the erase command, and reinstalled. The desktop indicator was back to normal (oddly, when booting from an external disk the indicator for the internal still showed the correct figures before I repartitioned it).
A couple of days ago I started having problems with file reads. Fortunately I had backed up the day before. Again, Disk Utility said everything was fine. I tried the erase again, writing zeros to see if there might be some bad blocks. About 3/4 of the way through the utility reported an unrecoverable error and unmounted the disk. It also deleted it from the sidebar. A second try had the same result.
I restarted and got a notice that there was an unrecognized disk attached and offered to reformat it. No idea what caused this since reparitioning didn't report any problems.
Under warranty so I paid the $9.95 for express shipment. Got email today that due to shortages Seagate couldn't ship on the promised 2-day delivery.
I really notice the slowdown now that I'm back to the original slower Mac HDD that came with the MacBook Pro.
When the XT worked it worked well, but two failures in 6 months--neither of which could be found by standard diagnostics--make me a little leery of using this drive in the future. Fortunately, I make full backups every week.
Rick