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Forum Discussion
Disk attempted to add is too small with an Identical disk??
I had an HD crash of one of my Seagate ST31500341AS 1397 GB on my ReadyNAS Pro with RAID Level X-RAID2, 6 disks (with dual redundancy) I had already ordered an extra disk when I put the NAS together ...
Have you used the disk in any other machine, in other words has it been formatted to any file system previously?
I had this problem with two identical 500GB Samsung HD501LJ disks and was never able to get my NV+ to take the second one. The only thing I came up with is that I had used the second disk for a temporary use and it had been formatted to NTSF (Vista). I wound up used a refurbished 750GB disk that Seagate had sent me as a replacement for a failed 500GB disk. The Samsungs even had sequential serial numbers (last four digits 1984 and 1985). Tried everything, even using Windows Disk Manager to delete all the partitions. The Samsungs were in bays 3 and 4 with two Seagate 500GB drives in bays 1 and 2.
Recently I used both 500GB disks in that very same NAS, but it was only the two and I started with a factory default.
You might try this - shut down the Pro and remove all the disks, noting which bay each one is in. Either tagging the drives or listing the serial numbers and the bay. Then insert the spare drive as a solo and do a factory default if the Pro doesn't do one on it's own. It won't take long to initialize a single drive. Then shut the Pro down, return all the other drives to their original bay and reboot. Then see if you can hot add the spare and have it accepted. I never tried this, as it didn't occur to me.
If it does not, it just means the drive is one sector short of the other drives. I am sure you don't want to hear the alternative - backup, factory default, restore. Three little words that on a Pro full of data will be a real chore. Of course we all know you maintain a current and complete backup anyway, don't we. So that step at least is already done.
I had this problem with two identical 500GB Samsung HD501LJ disks and was never able to get my NV+ to take the second one. The only thing I came up with is that I had used the second disk for a temporary use and it had been formatted to NTSF (Vista). I wound up used a refurbished 750GB disk that Seagate had sent me as a replacement for a failed 500GB disk. The Samsungs even had sequential serial numbers (last four digits 1984 and 1985). Tried everything, even using Windows Disk Manager to delete all the partitions. The Samsungs were in bays 3 and 4 with two Seagate 500GB drives in bays 1 and 2.
Recently I used both 500GB disks in that very same NAS, but it was only the two and I started with a factory default.
You might try this - shut down the Pro and remove all the disks, noting which bay each one is in. Either tagging the drives or listing the serial numbers and the bay. Then insert the spare drive as a solo and do a factory default if the Pro doesn't do one on it's own. It won't take long to initialize a single drive. Then shut the Pro down, return all the other drives to their original bay and reboot. Then see if you can hot add the spare and have it accepted. I never tried this, as it didn't occur to me.
If it does not, it just means the drive is one sector short of the other drives. I am sure you don't want to hear the alternative - backup, factory default, restore. Three little words that on a Pro full of data will be a real chore. Of course we all know you maintain a current and complete backup anyway, don't we. So that step at least is already done.
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