Introduction; Precautions - IEI Technology WSB-9152 User Manual

WSB-9152 PICMG 1.0 SBC

7.1 Introduction

The JMicron JMB363 SATA RAID chipset can control parallel ATA (PATA) and SATA
disks. The JMicron controller supports PATA UDMA transfer modes up to mode 6 and
SATA II disk drives. The JMicron JMB363's RAID functionality can increase the data
read/write speed (RAID 0) or provide data protection by mirroring drive data (RAID 1).
CAUTION!
A configured RAID volume (which may consist of multiple hard drives)
appears to an operating system as a contingent storage space. The
operating system will not be able to distinguish the physical disk drives
contained in a RAID configuration.

7.1.1 Precautions

One key benefit a RAID 1 configuration brings is that a single hard drive can fail within a
RAID array without damaging data. With a RAID 1 array, a failed drive can be replaced
and the RAID configuration restored. Total data loss occurs when one drive fails in a RAID
0 array.
WARNING!
Irrecoverable data loss occurs if a working drive is removed when
trying to remove a failed drive. It is strongly recommended to mark the
physical connections of all SATA disk drives. Drive locations can be
identified by attaching stickers to the drive bays. If a drive member of a
RAID array should fail, the failed drive can then be correctly identified.
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