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Is this sysyem using software or hardware raid? I suspect the later since you say that it is RAID 5 and you were able to boot wit what would be a corrupt software RAID configuration. The clue would lie in the output of 'df'. If it shows the devices to be like /dev/sd* instead of /dev/md*, then it's hardware RAID. The fix, obviously, depends entirely on what kind of RAID is being used.
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Is this sysyem using software or hardware raid? I suspect the later since you say that it is RAID 5 and you were able to boot wit what would be a corrupt software RAID configuration. The clue would lie in the output of 'df'. If it shows the devices to be like /dev/sd* instead of /dev/md*, then it's hardware RAID. The fix, obviously, depends entirely on what kind of RAID is being used.

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Thanks for your reply. &nbsp;<br />
The output of 'df' shows /dev/sd* and it is a hardware RAID. &nbsp;If you need more details i am ready to provide. Pls have to fix it earlier.
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Thanks for your reply.  
The output of 'df' shows /dev/sd* and it is a hardware RAID.  If you need more details i am ready to provide. Pls have to fix it earlier.

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Thankyou. I got an idea from the support person who supplied the server. &nbsp;We can recreate the raid using the utility provided with the server.
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Thankyou. I got an idea from the support person who supplied the server.  We can recreate the raid using the utility provided with the server.

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 &nbsp;We had a RAID5 server with five physical harddisks. &nbsp;Due to some problem one of the hard disk failed. Since it a hot pluggable server, we replaced the failed harddisk while the server is up. &nbsp;The server started to rebuild the RAID, but failed. <br />
&nbsp; On rebooting the server, the /proc/mdstat file shows that the RAID was not running adn the file /etc/raidtab was also missing.<br />
&nbsp; How to overcome the problem?
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  We had a RAID5 server with five physical harddisks.  Due to some problem one of the hard disk failed. Since it a hot pluggable server, we replaced the failed harddisk while the server is up.  The server started to rebuild the RAID, but failed. 
  On rebooting the server, the /proc/mdstat file shows that the RAID was not running adn the file /etc/raidtab was also missing.
  How to overcome the problem?

RAID problem

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