Intel SS4000-E Raid 5 DEGRADED Status

[idata]

Hi there,

I have external NAS with Intel SS4000-E Raid.

I configured this NAS a while ago with RAID 5 Disk configuration, however this morning the status showing "Degraded" (as shown on picture)

Note: I haven't replaced any of the drive

I am not expert on this one, but the system log said one of the hard drive failed.

Can somebody explain to me what should i do?

Thanks in advance

[idata]

can anybody help with this problem i'm facing?

thanks

[Edward_Z_Intel · Accepted solution]

The RAID is rebuilding on disk 4. Also, disk 2 is not being used. What's your initial RAID configuration? It seems to me that disk 2 failed, while disk 4 was configured as a hot spare, so it took the place. But disk 2 was brought back online, maybe after a reboot of the unit.

At this moment I think you can leave it as is, and wait till the rebild complete. Then check the log for errors. Most likely disk 2 needs to be replaced.

[idata]

Hi Edward,

Thanks for your support,

The initial disk configuration was Raid 5 + Spare (using 4 hard drives)

It seems like it finished rebuilding now, however if i want to replace disk 2 which seems to be the problem do I have to move disk 4 to disk 2 slot or i just need to replace the hard drive in disk 2?

Thanks in advance

[Edward_Z_Intel]

Do NOT move disk 4 into slot 2! If you do so while the system is on, the RAID becomes degraded again, and will have to go through another rebuild.

Instead, just insert a new drive into slot 2. It should become a spare automatically when it's added to the RAID.

[idata]

Thanks for your quick response Edward, it's a great help for me.

Another quick question, currently i'm using 4 x 320GB hard drive.

If I switch disk 2 hard drive to a larger capacity let say 500GB, will it be a problem?

Also does it need to be identical brand for the disk drive, or i can switch to other brand?

Thanks

[Edward_Z_Intel]

500 capacity is OK, but only 320GB will be used. Other brand should also be fine, but it's recommended to use disks with same RPM to avoid vibration issues.