Texas Memory Systems RamSan-325/325c - Manual (Page 9)

RamSan-325/325c User’s Manual - 5 -
The system monitors the internal disks and batteries for a failure
condition. In such an event, it notifies the operator of an error through the
front panel display and the management software.
1.5 Configurable Backup
The RamSan-325 allows the administrator to set backup modes for each
LUN individually or system wide.
Active Backup TM mode (optional)
This ideal mode for most users is only available from Texas Memory
Systems. In Active Backup mode, the RamSan uses available internal
bandwidth (i.e. performance not utilized by the applications) to constantly
backup memory to the disks. The system automatically optimizes this
operation to backup the maximum amount of data at any given time
without affecting performance. This means that at any one time, most of
the data already resides on disk. Upon emergency or shutdown, the unit
need only finish the backup that is already nearly completed. Active
Backup is an optional feature on the RamSan-325; therefore, some
systems may not display this option.
Datasync mode
In DataSync mode, reads and writes are done only to memory. The disks
remain offline during normal operation. If power loss occurs and the
shutdown timer reaches zero, or the user requests a shutdown, the
system takes the Fibre Channel interfaces offline and synchronizes all data
to the internal hard drives.
None (Volatile) mode
This operational mode disables the backup functionality for the LUN
making it completely volatile. In the case of system shutdown or failure,
all data stored in the selected LUN will be lost intentionally.
1.6 Performance
The RamSan-325 series solid state disk is the ultimate in performance
storage. With up to eight Fibre Channel ports in a 3U package, the
RamSan-325 series delivers unparalleled bandwidth and I/O. The
RamSan-325 series is capable of 250,000 IOPS (I/O operations per
second) and 1,500 MB/sec of read or write performance.