Seagate SAS drive SMART fail, Fails long DST, fixall then Passes long DST
I have a failing ST4000NM0043 SAS drive. I started receiving warnings about the drive a week or so ago, so I removed it from service. Out of curiosity, I went through the trouble of making the drive visible to Seagate Seatools. The drive failed the long drive fitness test, as I expected it to. Seatools recommended running a fix all command on it, which I did, now the drive passes the long drive fitness test?
If I use smartctl, it still reports: SMART Health Status: DATA CHANNEL IMPENDING FAILURE GENERAL HARD DRIVE FAILURE [asc=5d, ascq=30]
Obviously, I'm not going to use the drive, but I am curious - is the passing of the DFT suggesting that the drive should be suitable for use?
Also, the drive has fairly low hours on it, but a lot of start/stop cycles due to the nature of this particular array's usage profile. It is only accessed a few times a day, but power is applied 24/7. It has 25K hours and shows Accumulated start/stop cycles: 6633. The drive (and all the drives in this array) show a specified cycle count over the device lifetime to be 10,000. I didn't realize the start/stop lifetime was so low - I think I thought the load/unload lifetime was what mattered. Are these drives more likely to fail before 5 years (what I projected them to last) due to my spinning them up and down 6 times a day as opposed to keeping them spinning from 6:00pm until 8:00am, which is when they are in use?