User`s guide

RAID Array 3000 Pedestal Enclosure
2–18 EK–SMCPO–UG. A01
CAUTION
RAID 5 can withstand a single failure and handle
I/O activity without interruption in degraded mode
until the failed drive is rebuilt. If a second drive
fails while the RAID set is in degraded mode, the
entire RAID set will fail.
2.6.6 JBOD
JBOD, which stands for “Just a Bunch of Disks”, makes it possible to connect
one or standalone disk drives to the controller. A JBOD disk drive is not part of a
redundancy group, even though the controller assigns a redundancy group num-
ber to the drive. This number becomes that logical unit number (LUN) that the
host will use to address the drive.
One use for JBOD is to connect a system disk drive to the controller. The drive
does not become part of a RAID set, but it is made available to the host on the
same SCSI bus as the other devices controlled by the controller.
2.7 System Parameters
The system parameters (see Table 2–6) allow the user to customize certain as-
pects of the controller via the StorageWorks Command Console (SWCC)
Graphical User Interface.