Rocstor®
Rocsecure® DE51
[15]
LARGE (SPANNED SET)
Minimum number of drives: 2
Unit Capacity: 100% of all drives together regardless of differences in size.
Spare: No.
Fault tolerance: cannot withstand the loss of any drives without losing data. However, some data may be
recovered as long as the drive(s) carrying the filesystem data (boot record, directory, etc.) remain online. LARGE
mode is neither a RAID nor is it a JBOD. It works by declaring the sum of all available space of the member drives
as a single unit, without striping the data. As each member is filled, new data is stored on the next...
NOTES ABOUT SPARE DRIVE
If EZ mode is disabled (SW1: 2 ON), all individual drives not configured as array members will be offered to the
host adapter as separate units. To create an array with one or more spares, set or modify the RAID mode while
the spares are disconnected from the Port Multiplier. When EZ mode is enabled (SW1 :2 OFF), individual
drives connected when an array is present are considered spare. Spare drives must be equal to or larger in size
than the smallest member. When any type of array is defined, individual units will be considered spare
Raid 0 and LARGE arrays are not fault-tolerant and spare drive will not be useful, therefore disabling EZ for
these arrays is recommended. When a spare drive is present and fault-tolerant RAID (1, 10, 3, or 5) is defined,
EZ Mode will automatically rebuilt any available spare into the array to replace failed drive.
RESETTING RAID
NOTE:
This procedure destroys all RAID data. It should not harm individual drives or their contents; however,
creating backups of all data is strongly recommended before
proceeding.
Be sure the port multiplier is
connected to an active host before proceeding. The port
multiplier will not complete the process if it has no
host connection.
1.
Power down the unit and set the dip switch to the desired RAID Mode.
2.
While holding the SET button, turn the unit on. A long beep will sound from the Port Multiplier. The SET button
may be released once the long beep starts. Shortly after releasing the SET button, the port multiplier should
"chirp" to indicate the process is complete. If instead of a chirp the Port Multiplier sounds a series of short
beeps, an error has occurred during the process.
