Maintenance Procedures; Drive Maintenance; How The Storage Array Handles A Failed Drive; How To Tell That A Drive Has Failed - HP HPE Alletra 2140 Hardware Manual

Maintenance Procedures

The following topics describe maintenance procedures for the HPE storage array.

Drive Maintenance

The procedures for maintaining drives are the same for the following:
Solid State Drives (SSDs)
Arrays
Expansion Shelves

How the Storage Array Handles a Failed Drive

The HPE storage array is designed to be highly available, with redundant components. In some cases, more than one drive
could fail. If this occurs, the arrays use integrated spare space to rebuild data on one drive, even before the failed drive is
replaced. This ensures that the array restores maximum data redundancy in a timely manner.
When a drive fails, a rebuild process starts automatically on spare distributed space (not to a dedicated spare drive). If the
failed drive is inserted back to the array and is determined to be usable, a quick rebuild reinstates the drive. Even if a rebuild
has already begun on integrated spare space, the quick rebuild takes priority, and the full rebuild is halted.
When a new replacement drive is inserted, if data has already finished repopulating to the integrated spare space, data is
copied back to the new drive. If a second drive fails, and no drives have yet been replaced, there will be no second rebuild,
since the array can only rebuild the amount of data on one drive of integrated spare.

How to Tell that a Drive has Failed

Any of the following events can indicate that a solid state drive (SSD) has failed:
LEDs are solid red or off
Event appears in the Events list
Receipt of an alert email from the array.
1 Drive operation

Replace a Drive (SSD)

Use this procedure to replace SSDs in your HPE storage array or expansion shelf.
Before you begin
Time required:
Parts required:
2 Drive fault
5 to 10 minutes
Replacement drive ordered from HPE
Maintenance Procedures 65