4 Different Methods of How to Check RAID Status
Here you will find out:
- how to check what RAID you use
- how to check RAID array status
- when DiskInternals can help you
Are you ready? Let's read!
How to check what RAID you use
To find out which RAID you are using, just type one command to the command line:
lspci | grep RAID
There may be several responses to this request:
- Hewlett-Packard is your HP RAID array
- 3ware is your 3ware RAID array
- megaRAID is your MegaRAID array
If you do not receive a response or some other answer, then most likely you have software RAID.
RAIDs and their status
- 1. Check the Status of 3ware RAID
To do this, enter “tw_cli”. On different systems, this may be tw_cli.amd64 or tw_cli.i386.
After that, you need to find the number of your controller and check its status.
Example:
Where c1 is the controller.
Then look at the Status column; it shows the state of the array.
- 2. Check the Status of HP RAID
Here you need to enter the following command:
As a result, you will see whether the RAID is working or not.
If it works well, you will see OK on the screen.
- 3. Check the Status of MegaRAID
In this case, enter:
In the Hlth column, the status should be Opt.
If not, it means there are problems with the array.
- 4. Check Software RAID Status
This RAID is in the range in the previous value fields and in FSx.
The following command is used here:
cat /proc/mdstat
The output will be:
blocks [2/1] [_U]
blocks [2/2] [UU]
[UU] or U = healthy, full-featured RAID partition.
[_U] or [U_] = failed disk.
RAID statuses could be different in utilities
If you use a special utility, for example Adaptec Storage Manager, there can be other statuses:
- Optimal: works at the highest level
- Degraded: works at the average level
- Failed: does not work at all; a specific error should also be highlighted here, and which disk it refers to.
- Recovery: returned to optimal condition. This condition is intermediate, so the RAID is in not very good shape.
RAID Recovery: a key to RAID data safety
The best option for recovering an array is DiskInternals RAID Recovery.
After downloading and installing the application to your computer, you just need to open it and click the "RAID Recovery" button, then select the reading mode. Re-save the recovered data to an external data store.
You can also use Uneraser recovery mode if some or all of the data has been deleted from any RAID.
RAID Recovery is the most advanced tool on the market that automatically detects the type of RAID array, file system, the number and order of disks, and the controller, while at the same time providing for completely manual operation. The utility is compatible with Dell, Adaptec, HP, MegaRaid, and DDF-compatible devices, as well as silicone RAID controllers. This software is suitable for all types of arrays: RAID 0, 1, 0 + 1, 1 + 0, RAID 4, RAID 5, 10, 50, 5EE, 5R, RAID 6, 60 and JBOD, which are connected to a dedicated controller RAID motherboard with RAID support from VIA, NVidia, or Intel.
Using this application, you are guaranteed to recover more than 90% of the data from the damaged array.