NonStop S-Series Operations Guide (G06.24+)

Disk Drives: Monitoring and Recovery
HP NonStop S-Series Operations Guide—522459-007
9-2
Overview of Disk Drives
Overview of Disk Drives
The NonStop S-series server supports both internal and external disk drives. A system
enclosure can contain different types of disk drives. However, both disk drives in a
mirrored volume must always be the same type of drive.
•
External disk drives connect to a NonStop S-series server using fiber-optic
connections provided either by a 6760 ServerNet device adapter (ServerNet/DA)
or by a Fibre Channel ServerNet adapter (FCSA). For more information about
ServerNet/DA, refer to Section 7, ServerNet/DA: Monitoring and Recovery. For
more information about FCSA, refer to Section 8, Fibre Channel ServerNet
Adapter: Monitoring and Recovery. Enterprise Storage Systems (ESS) are
supported externally through FCSAs.
•
Internal disk drives are housed in disk drive CRUs installed behind the door on the
appearance side of a system enclosure. (See Figure 9-1.) Each system enclosure
contains slots for up to 16 internal disk drive CRUs, arranged in two rows. The
slots are numbered 01 through 08 in the upper row and 11 through 18 in the lower
row.
Each disk drive CRU has a part number/bar code label, a write-on label (for the logical
device name), and these indicator light-emitting diodes (LEDs):
•
Green power-on LED
When lit, the green power-on LED indicates that the disk drive is receiving power.
•
Yellow or amber activity LED
When lit, the yellow or amber activity LED indicates that the disk drive is executing
a read or write command.
Figure 9-1. Disk Drive CRU
106CDT .CDD
Green Power-On LED
Yellow or Amber
Activity LED
Write-On Label
Part Number/
Bar Code Label