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|Netra Blade X3-2B (formerly Sun Netra X6270 M3 Server Module) HTML Document Collection|
Drives located in the Netra Blade X3-2B are considered to be in a separate “failure domain” from the drives that are in the storage module M2 disk enclosure. A failure domain is an enclosure or group of enclosures that connect to the drives in the same way.
Because the blade connects to the drives using a single wire and the storage module M2 connects to the drives using two wires, they are different failure domains. Thus:
The drives in different failure domains must not be part of the same RAID volume (or be hot spares for that volume).
Because two or more blade M2 disk enclosures are considered to be in the same failure domain, RAID volumes and hot spares can be composed of drives from multiple storage modules.
Disks that only use a single wire (port) connection are not supported in the storage module M2 because it connects to disks using two wires. These unsupported drive types include SATA and SATA SSD drives. Both single wire and two wire drives are supported in the Netra Blade X3-2B.