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When using RAID 5, why is the HD light on all the time.
07/07/08
10:23:08 am, by richard 
, 112 words 
Categories: Ubuntu Linux, Filing Systems, Installation and Configuration
When using RAID 5, why is the HD light on all the time.
After the installation and for the next hour or so, depending on the size of your RAID 5 array, there will be high disk activity. This is due to the RAID 5 array working through it’s initialization for the parity part odf the array. To see the progress of the process, run the following in a window. You can continue to use your system while this happens.
Try This Out:
cat /proc/mdstat
Example Ouptut:
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid5 sda2[0] sdc2[2] sdb2[1]
312110592 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU]
md2 : active raid1 sda1[0] sdc1[2] sdb1[1]
192640 blocks [3/3] [UUU]
md1 : active raid1 sda3[0] sdb3[1]
3807296 blocks [2/2] [UU]
unused devices: <none>
md0 : active raid5 sda2[0] sdc2[2] sdb2[1]
312110592 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU]
md2 : active raid1 sda1[0] sdc1[2] sdb1[1]
192640 blocks [3/3] [UUU]
md1 : active raid1 sda3[0] sdb3[1]
3807296 blocks [2/2] [UU]
unused devices: <none>
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