Intel® Server Board SE7520AF2 TPS
Integrated Intel® RAID Controller SROMBU42E
Revision 1.2
89
Intel order number C77866-003
controller and drive enclosure, the error may be evident via the color of LEDs, the flashing of
LEDs, or audible alarms.
4.3.7
Decoding an Audible Alarm
The following list of beep tones is used on Intel RAID controllers using Software Stack 2. These
beeps usually indicate that a drive has failed.
Degraded Array - Short tone, 1 second on, 1 second off
Failed Array - Long tone, 3 seconds on, 1 second off
Hot Spare Commissioned - Short tone, 1 second on, 3 seconds off
The tone alarm will stay on during rebuild. After rebuild completes, an alarm with a different tone
will sound.
The disable alarm option in either the BIOS Console or Web Console management utilities will
hold the alarm disabled after a power cycle. The enable alarm option must be used to re-enable
the alarm.
The silence alarm option in either the BIOS Console or Web Console management utilities will
silence the alarm until a power cycle or another event occurs.
4.4 Levels of RAID
4.4.1
RAID 0 - Data Striping
In RAID 0, data blocks are split into stripes based on the adjusted stripe size (for example, 128
KB) and the number of hard disks. Each stripe is stored on a separate hard disk. Significant
improvement of the data throughput is achieved using this RAID level, especially with sequential
read and write. RAID 0 includes no redundancy. When one hard disk fails, all data is lost. A
single drive can be chosen as a RAID 0 drive as a method to pass a single drive through to the
operating system; however, RAID 0 usually denotes two or more drives.
Figure 20. RAID 0