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All disk drives are over-engineered for extended life and the drive's firmware can be updated non-disruptively.
All disk drives can be replaced with no disruption to the system.
With a maximum of 240 disk drives total, the total internal system raw capacity of a single StorageTek 9985V
system is 69.2 TB (precise engineering measurement) or 72 TB in terms of a rounded up marketing
measurement.
300 GB Disk Drives and RAID 6
The introduction of 300 GB 10K and 15K disk drives has attracted a considerable amount of interest from the
Sun field. Additional complexities are associated with the 300 GB disk drives include the following:
RAID 6 (6+2) is a recommended option. When the ST 9990 was first released, RAID 6 was an was
required. That requirement has since been relaxed, and RAID 6 now has the status of a recommended
option.
Performance considerations associated with RAID 6
The amount of shared memory required will vary according to the capacity associated with the installed
300 GB disk drives. Please refer to the ST9985V maintenance manual, which is available only to
authorized support personnel.
The reason why RAID 6 is a recommeded option with 300 GB drives is to protect against double disk drive
failures.
Just the Facts
October 2007
45
Sun Confidential – For Internal Use and Authorized Partner Use Only
Disk Drive Interface
Connector
Disk Drive
Handle