Quantum StorNext M660 - Stornext M660 Metadata Expansion Unit

Chapter 2: Hardware Overview
StorNext M660 Components
StorNext M660 Metadata Appliance Hardware Guide 31
StorNext M660
Metadata Expansion
Unit
The StorNext M660 Metadata Expansion Unit adds an additional
Metadata Storage Array to the M660 system that features a fully
populated 24-drive 2U storage enclosure. The first two drives are global
hot spares. The next six are configured into three 1+1 RAID-1 mirrors.
These mirrored sets are split into two stripe groups (SGs): SG0 combines
three 12-GB LUNs into the metadata and journal for the shared file
system. SG1 combines three 888-GB LUNs into the shared HA file
system. The Metadata Expansion Unit includes the StorNext Storage
Manager database.
The Expansion Unit is supplied with dual Snowmass controllers. Each
controller provides two 6Gb Serial Attached SCSI (SAS) host ports with 2
GB of system cache. The HDDs and SSDs are supplied in hot-swappable
drive carriers that fit in the drive bays.
The Expansion Unit consists of the following:
• Metadata Expansion Unit – Front View
• Metadata Expansion Unit – Rear View on page 32
Metadata Expansion Unit – Front View
The front of the StorNext M660 Metadata Expansion Unit contains the
left end cap, which contains the drive tray LEDs, the right end cap, and
the drives (see
Figure 13).
Figure 13 StorNext M660
Metadata Expansion Unit –
Front View
The StorNext M660 Metadata Expansion Unit has a series of indicators
and buttons located on the front and back of the array.
Global
Hot Spares
3 x 1+1
RAID 1
8 x 1+1
RAID 1