White Papers

9 Dell HPC NFS Storage Solution – High Availability (NSS7.0-HA) Configuration
3 Dell PowerVault MD3460 and MD3060e storage arrays
Both PowerVault MD3460
(7)
and MD3060e
(8)
storage array are 4U, 60-drive dense enclosures. The major
difference between them is that the MD3460 has dual active-active RAID controllers and is used as an
RBOD (Redundant Array of Inexpensive Disks Bunch of Disks), while, the MD3060e is an EBOD (expansion
bunch of disks), which is usually used to extend the capacity of the PowerVault MD3460.
NSS7.0-HA shares the same storage configurations as NSS6.0-HA
(5)
. Table 2 summarizes the supported
storage configurations of the NSS7.0-HA.
Storage configurations in NSS7.0-HA
Storage
configurations
240 TB: One PowerVault MD3460
480 TB: One PowerVault MD3460 + One PowerVault MD3060e
Disks in
storage array
4 TB NL SAS.
Virtual disk
configuration
 RAID6 8+2, a virtual disk is created across all five drawers in a storage
array, two drives per drawer.
 Segment size 512 KiB
 Write cache mirroring enabled
 Read cache enabled
 Dynamic cache read prefetch enabled
Storage
enclosure
cabling
Chain cabling scheme
Logical
volume
configuration
Stripe element size: 512 KiB
Number of stripes: 6
Number of virtual disks per logical volume:
 6 virtual disks for 240 TB configuration
 12 virtual disks for 480 TB configuration