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Networked VGA Grid User
Guide
Read data from removed storage disks
If using multiple drives and one of the drives fails or is removed, then the RAID needs to be
rebuilt. The files stored on the remaining drive(s) will need to be downloaded via Admin panel,
AFU or FTP prior to RAID rebuild.
These steps describe how to read the recorded files from the removable storage drives using Ubuntu.
Depending on your exact version of Linux, the steps you follow may differ slightly from the steps
below.
To read the recorded files:
1. Install Linux on a workstation where the drives will be installed (Ubuntu or Debian are recommended.
RedHat/CentOS/Fedora are also supported).
2. Confirm mdadm tool is installed, if not, install it. For Ubuntu/Debian use apt-get, for RH/CentOS use
yum.
3. Turn off the workstation and connect the storage drives (if using RAID 1 you can attach just one drive).
4. Start the workstation.
5. If only one drive of a RAID 1 set is connected:
a. Open a terminal window and enter the following in the command line to determine the name of
the disk:
sudo fdisk -l
b. Issue this command to build the disk:
(In the example, the disk name is /dev/sbd1. Your disk name may be different.)
sudo mdadm —assemble /dev/md0 /dev/sdb1
c. The following message appears:
mdadm: /dev/md0 has been started with 1 drive (out of 2).
6. Verify that RAID is started. At the command line, enter:
sudo mdadm -D /dev/md0
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