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NAS 1000S general failure, data loss

 
Xavier Badosa
New Member

NAS 1000S general failure, data loss

On a NAS 1000S from March 2005 we suffered several exceptions while reading memory, and need to replace disks maybe once every 3 months for bad sectors. HP opened a case and memory is attached to the hardware, so it's not possible to change memory alone. Also they didn't had stock, so we waited for solutions and hardware replacement.
On September there was a warming of a bad block on a disk, so we extracted it, and when inserting the new disk there was another exception error, dump of memory, and impossible to start again the system, even on safe mode, or with the second system.
Attaching the 4 discs to another computer we found 2 of them were unreadable, 1 ok, and another missing, so that meant data loss.
Also discs are dynamic, so if operating system fails is impossible to read their information, and because a disc has a partition of system, and another for raid 5, that makes recovery even more difficult.
With an image of the system we reconstructed it on a new computer, but then we found another unpleasant surprise: HP has a protection system that prevents to move the OS from their hardware to another.
Finally we had to install everything on a new hardware, and recover data from last available backup. Support from HP has been limited to send another hardware one week after disaster.
We hope our experience helps others to avoid same problems, and don't use similar NAS for critical applications. Also it's advisable to have OS and data in different disks, RAID by hardware, and another hot-swap drive.
To HP it would be wonderful to advice potential buyers that memory cannot be changed or increased, and OS cannot be moved to other hardware. All this makes problems bigger and recovery more difficult.