Disk Drives And Flash Drives; Drive Maintenance Policy - IBM DS8880 Series Introduction And Planning Manual

Disk drives and flash drives

|
|

Drive maintenance policy

Storage server
The storage server consists of two processor complexes, two or more I/O
enclosures, and a pair of power control cards.
Processor complex
The processor complex controls and manages the storage server functions
in the storage system. The two processor complexes form a redundant pair
such that if either processor complex fails, the remaining processor
complex controls and manages all storage server functions.
Power control card
A redundant pair of power control cards coordinate the power
management within the storage unit. The power control cards are attached
to the service processors in each processor complex, the primary power
supplies in each frame, and indirectly to the fan/sense cards and storage
enclosures in each frame.
The storage system provides you with a choice of drives.
The following drives are available:
v 2.5-inch Flash Tier 0 drives with FDE
– 400 GB
– 800 GB
– 1.6 TB
– 3.2 TB
v 2.5-inch Flash Tier 1 drives with FDE
– 3.8 TB
v 2.5-inch Flash Tier 2 drives with FDE
– 7.6 TB
v 2.5-inch flash drives with FDE
– 400 GB
– 800 GB
– 1.6 TB
v 2.5-inch disk drives with FDE
– 300 GB, 15 K RPM
– 600 GB, 15 K RPM
– 600 GB, 10 K RPM
– 1.2 TB, 10 K RPM
– 1.8 TB, 10 K RPM
v 3.5-inch disk drives with FDE
– 4 TB, 7.2 K RPM
– 6 TB, 7.2 K RPM
Note: Intermix of Flash Tier 0, Flash Tier 1, and Flash Tier 2 drives is not
supported.
The internal maintenance functions use an Enhanced Sparing process that delays a
service call for drive replacement if there are sufficient spare drives. All drive
repairs are managed according to Enhanced Sparing rules.
A minimum of two spare drives are allocated in a device adapter loop. Internal
maintenance functions continuously monitor and report (by using the call home
Chapter 2. Hardware features
47