SMART message that you do not ever want to see
February 28th, 2007 by ktula
10 Spin_Retry_Count 0×0013 097 097 097 Pre-fail Always FAILING_NOW 0
But unfortunately, that is exactly what i am seeing when i run “smartctl -a -d ata /dev/sdb” on one of the two Seagate SATA disk drives in my Thecus N2100 NAS. I have been troubleshooting the extreme slowness of my NAS since last week. Any attempt in transferring files from some shared folders or just viewing the content of some folders would result in the CPU on the N2100 being pegged at 100%. Initially, i thought it was RAID-related so i tried the following: rebooting several times, getting rid of my shared drive and rebuilding it, clearing all the AFP related files (in .AppleDB and .AppleDouble), transferring files using SMB and FTP instead of AFP. Rebooting the NAS helped on one occasion but the slow file transfer problem would come back later.
I ran the smartctl command earlier this week but i did not see any issue. That was because i was running it on the good disk drive (/dev/sda)!
Right now, i am trying to migrate the data i have on the NAS to my locally connected external Firewire enclosure, but when the transfer is hitting on the data stored on the failing disk drive, it is going very very slowly, about a meg every 10 seconds, instead of the normal 10 meg a second. At this rate, and with more than 200 GB of data to go, it will take more than 500 hours to complete the transfer, assuming that the failing disk drive will hold up that long.
When i do get my replacement disk drive from Seagate, you can be sure i won’t be using RAID0 or JBOD for my NAS, it is going to be RAID1 from now on!
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