Identify the failed disks that must be repaired or replaced, and later verify that the disks no longer show “Failed.”
Take care to always use the same physical type and size of drive when possible. A smaller disk drive cannot be used as a replacement for a larger one, and is not supported. It is possible to use a larger disk, but the difference in capacity becomes unused space. Teradata recommends never using a different size disk because it is risky.
When replacing failed disks, write down the disk numbers for all the disks in the drive group. These numbers correspond to the physical tray and slot numbers on the array. Drive groups have either two disks (RAID 1) or four disks (RAID 5). For example, a RAID 1 LUN resides on the 11th column of disks, as shown in the SYMplicity Storage Manager example that follows. The command to recreate the volume(s) requires the disks be specified as "1,11 3,11" where the first number (1 and 3) is always the tray number and the 2nd number (11 in this case) represent the slot where the physical disk resides.
When disks are replaced, SYMplicity Storage Manager shows the drives as replaced. Sometimes the disk array performs initialization steps automatically when a disk is replaced. You cannot continue with manual repairs to the drive group until the initialization is complete. This can take some time to complete and can be tracked by selecting the volume in SYMplicity and choosing Properties to display a progress indicator for the initialization of the newly created volume.
- Open the SYMplicity Storage Manager Client again from any node attached to the array as in “Step 1 - Verify Disk Failure and Identify Disks to be Replaced”.
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Right-click the array in the Enterprise Management window and select Manage Device.
The Array Managementwindow for the array appears.
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Locate the icons for the replaced drives in the Hardware View of the Array Management window.
The drives are yellow.To view a window showing the drive is unassigned, optimal, and identifying the missing volume group, hover the pointer over the drive.
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Click the drive icon.
The properties appear in the right Properties panel.
- Verify in the window that the Tray and Slot numbers match those you recorded earlier and that the drive Status is now Optimal and the Mode is Unassigned.
- Close the window.
- Repeat these steps for the other replaced drive.