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Forum Discussion
Bad Hard Drive Swap
One of the disk drives in my ReadyNAS Pro Business running OS6.9.3 started reporting “Detected high uncorrectable error count: [##] on disk 1”. I bought a new drive. A few weeks later it also reported...
Pending sectors (like reallocated sectors) are reported by the drive firmware itself. I don't know of anything the system can do to create either error.
Your scrubbing exercise might have resulted in the drive sparing the bad sectors. But I'd definitely schedule the built-in disk test in the NAS fairly frequently, and periodically look at the SMART stats (download the log zip, and look in smart_history.log and disk_info.log). The NAS email alerts use quite high thresholds (in my opinion much too high). So you need to keep on eye on the disk health yourself.
As far as the new drive goes, I have sometimes purchased drives that failed shortly after power-on. In some cases I suspect they were damaged in shipping/handling somewhere along the line.
- What is the best way to run a S.M.A.R.T. test on the original drive? Is there a way to test the disk using RAIDar from the Admin page? Seagate has a tool call "SeaTools for Windows". Will that work or do I need a different tool or a Seagate legacy tool because the disk is older? I plan to connect the original drive to my Laptop using a USB cable from a SATA to USB adapter. Will that require using a program like Ext2Fsd so as to recognize the drive? Thanks for the help. Just odd that the drive is now reporting that is just fine.
You can use seatools even though Windows won't recognize the file system on the disk. It will still detect the disk, and let you select it for testing. You won't need ext2fsd or similar packages. This is also the case with Western Digital's lifeguard program.
Start with the short diagnostic test, and if that passes try using the long test.
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