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Forum Discussion
[Duo v2] bad sectors because the two disks are different
Hello,
When I bought my ReadyNas Duo v2, only 1 hard-disk was included. A few weeks later, I decided to buy a second disk but the same disk was not available anymore.
I then chose an hard-disk with the closest specs (7200 RPM, 64MB, …).
Disk1: “no name” RueDuCommerce 3,5'' - 2000Go - 7200trs - SATA II - 64Mo
Disk2: The second is a Seagate 3,5'' 2000 GO Barracuda 7200.14 - 64MO - SATA 6 gb/s - ST2000DM001.
RAIDiator 5.3.5 (arm) is installed.
A few days after, I received some email notifications from the NAS telling that the number of sectors reallocated were increasing for the disk2.
Here is an example of message:
This is the forth message I received and they always arrive at 04:00.
Is it possible that these bad sectors are because the two disks are different?
When I ran the SeaTool (Seagate diagnostic tool), it reports that the disk passed all tests (the deep test that take hours). The disk already returned (for repair under waranty) once to the manufacturer (Seagate) but they returned me the same disk.
Any idea?
Philippe
When I bought my ReadyNas Duo v2, only 1 hard-disk was included. A few weeks later, I decided to buy a second disk but the same disk was not available anymore.
I then chose an hard-disk with the closest specs (7200 RPM, 64MB, …).
Disk1: “no name” RueDuCommerce 3,5'' - 2000Go - 7200trs - SATA II - 64Mo
Disk2: The second is a Seagate 3,5'' 2000 GO Barracuda 7200.14 - 64MO - SATA 6 gb/s - ST2000DM001.
RAIDiator 5.3.5 (arm) is installed.
A few days after, I received some email notifications from the NAS telling that the number of sectors reallocated were increasing for the disk2.
Here is an example of message:
New SMART disk errors detected! (RND2000)
Reallocated sector count has increased in the last day.
Disque 2:
Previous count: 1480
Current count: 1552
Growing SMART errors indicate a disk that may fail soon. If the errors continue to increase, you should be prepared to replace the disk.
This is the forth message I received and they always arrive at 04:00.
Is it possible that these bad sectors are because the two disks are different?
When I ran the SeaTool (Seagate diagnostic tool), it reports that the disk passed all tests (the deep test that take hours). The disk already returned (for repair under waranty) once to the manufacturer (Seagate) but they returned me the same disk.
Any idea?
Philippe
13 Replies
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Did you read my post above or is that just a typo CC4H is the latest firmware.
Yes, it was a typo.
I put the CC4H firmware.
Here is an interesting article by Seagate concerning the SMART read by third-party software: http://knowledge.seagate.com/articles/en_US/FAQ/203971en
At the end they say:...
Please remember that these third-party programs do not have proprietary access to Seagate hard disk information, and therefore often provide inconsistent and inaccurate results. SeaTools is more consistent and more accurate and is the standard Seagate uses to determine hard drive failure.
Do they mean that if the SMART data report reallocated sectors but that Seatool says everyting is Ok that the disk is fine? This is the case I am
If so, they will run Seatool (which reports no error) and return me back the same disk again :(
Philippe- As you have already discovered the SMART test portion of SeaTools is a simple pass/fail. What the fail threshold is I do not know. I do have a ST31000528AS drive that did fail the SeaTools long generic test and I now also have a third party SMART reading program. I think I will see what they show later today.
You can use ReadyNAS disk health (when in the NAS) or something like Acronis Drive Monitor to see the SMART stats. The stats for fully standard stuff like reallocated sectors are reported correctly. Seagate (and other vendors) have defined some of their own parameters - you can see them with third-party tools, but since the format isn't known they are not helpful. For instance, with my Seagates I see "Head Flying Hours" with a huge number (163221642158668). I have no idea how to interpret that. However, Reallocated Sector Count, Spin Retry Count are all easily understood.filzip77 wrote: Did you read my post above or is that just a typo CC4H is the latest firmware.
Yes, it was a typo.
I put the CC4H firmware.
Here is an interesting article by Seagate concerning the SMART read by third-party software: http://knowledge.seagate.com/articles/en_US/FAQ/203971en
At the end they say:...
Please remember that these third-party programs do not have proprietary access to Seagate hard disk information, and therefore often provide inconsistent and inaccurate results. SeaTools is more consistent and more accurate and is the standard Seagate uses to determine hard drive failure.
Do they mean that if the SMART data report reallocated sectors but that Seatool says everyting is Ok that the disk is fine? This is the case I am
If so, they will run Seatool (which reports no error) and return me back the same disk again :(
Philippe
Seagate (and other vendors) are willing to RMA their failed disks, however they do have an vested interest in minimizing returns on marginal disks. So it is good to see the actual thresholds for these key parameters. There are ways to return disks to Seagate even if Seatools passes. Though it is best if you are sure that the disk isn't up to spec before you use them.
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