I have configured a MSA1500. Created an Array and also created one logical disk then I have configured the SSP with enable and select host for that one logical disks. But when I am looking into host at Computer management in Disk management option, it is showing the disk from MSA but instead of one logical disk, it is showing two disk, when i am going to initialize both of the disks. Computer is giving me error for disk2 but disk1 is initialized.
I am worried about that why two disks are displayed instead of one ?
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RAID logically combines several identical disk-drives for better performance or for better reliability.
For better performance, one RAID configuration "stripes" the data, i.e., when you write a block of data, the block is split into "stripes", and each stripe is written to a different disk-drive.
Since each stripe is smaller than the whole block, it is faster to transfer the data in "parallel".
For better reliability, another RAID configuration writes each block of data _identically_ to multiple disk-drives. Thus, if one disk-drive fails, your data still exists on the other disk-drives.
You can then replace the "bad" disk in the array, and use software to "rebuild" this "mirroring" of your data, by copying all the data from one of the "good" disks onto the "new" disk.
So, in your case, one of the disks in your array is failing. Identify it. Replace it. Rebuild your array.
using the ACU (array configuration utility) create a raid 0 with this drive after the hard drive is being formatted and is configured as raid 0 (no redundant) restart the server and the hard drive should be detected as a new logical volume with a assigned letter "D" "E" ACU
As a rule of thumb, a raid 5 array can be expanded to include additional drives. This is done during the boot process and then going into your RAID controller setup. You would then go into the RAID configuration and add the new drive to the array. This was the simplified explanation but i think you get the idea.
Things to consider,
DO NOT remove the RAID array unless you dont care about losing data.
DO NOT try to add a smaller drive than what is currently part of the array.
When possible, the new drive should be identical to the existing drives, but I have added same size, same speed more than once and it will work.
All of the drives you want as part of the array must be on the same controller.
If the well meaning teenager took a non-raid configuration and created a RAID array, then any data on the drives was destroyed.
If you reply with the RAID array and HDD status information from the boot screen (THE intel Raid Controller will report the status of the array, degraded, normal or Failed and the status of each HDD member or non-member disk.) With that information I MAY be able to assist in getting the system to boot
Are you able to get into the array configuration and make sure the logical drive is still intact? If the logical drive is gone, then your partition may be lost. If you are able to recover the logical drive in your array (which you should be able to if the RAID5 striping was stable) then you should be able to recover your data. You can get into the array configuration during the boot up sequence.
Try all means to get a smartstart CD.
Normally new version will be able to use on older hardware , but no guarantees.
I have always found it easier to use smartstart CD auto mode.
You can also do the install and then run ntssd to update all the drivers etc., but I don't recommend it for novices. Use the auto mode , it takes longer but safely and surely.
Do you see your new disk in the "Disk Management" window? To get there go to "run", type "compmgmt.msc", then click disk management. If you do see the disks there, then you need to format the disk to a "basic" configuration. If your new disk/volume does not show up there, I would suggest a hard reset on your server whenever possible. I see this issue at times with Windows and newly added storage array logical drives.