Chapter 1 Product and Architecture Overview 1-7
Each disk drive is slot-independent, meaning that once a logical drive has been
initialized, the system can be shut down and the drives can be removed and
replaced in any order. In addition, disk drives are field-upgradeable to larger drives
without interruption of service to user applications. The drive firmware is also field-
upgradeable, but the firmware upgrade procedure requires interruption of service.
In the event of a single disk drive failure, with the exception of RAID 0, the system
continues to service all I/O requests. Either mirrored data or parity data is used to
rebuild data from the failed drive to a spare drive, assuming one is assigned. If a
spare is not assigned, you have to manually rebuild the array.
In the unlikely event that multiple drive failures occur within the same logical drive,
data that has not been replicated or backed up might be lost. This is an inherent
limitation of all RAID subsystems and could affect application programs.
An air management sled FRU is available for use when you remove a disk drive and
do not replace it. Insert an air management sled into the empty slot to maintain
optimum airflow through the chassis.
1.2.3.1 Sun StorEdge 3510 FC Array Disk Drives
The drives can be ordered in 36-GB, 73-GB, and 146-GB sizes. Thirty-six-gigabyte
drives have a rotation speed of 15,000 RPM, while 73-GB drives and 146-GB drives
have a rotation speed of 10,000 RPM.
1.2.3.2 Sun StorEdge 3511 FC Array Disk Drives
The disk drives incorporate Serial ATA (SATA) technology. They are optimized for
capacity, but have performance levels approaching Fibre Channel performance
levels. The drives are 250-GB drives and have a rotation speed of 7200 RPM.
1.2.4 Battery Module
The battery module is designed to provide power to system cache for 72 hours in the
event of a power failure. When power is reapplied, the cache is purged to disk. The
battery module is a hot-swappable FRU that is mounted on the I/O board with
guide rails and a transition board. It also contains the EIA-232 and DB9 serial
interface (COM) ports.
To Next Page
Loading...
Need help?
General
