Mylex AcceleRAID 352, Installation Manual

Page: 81 / 92

Glossary
Manual No. 775051 G-17
enclosure itself is treated as simply another device on the SCSI bus. Many
other leading server, storage, and RAID controller manufacturers worldwide
have endorsed the SAF-TE specification. Products compliant with the
SAF-TE specification will reduce the cost of managing storage enclosures,
making it easier for a LAN administrator to obtain base-level fault-tolerant
alert notification and status information. All Mylex RAID controllers feature
SAF-TE.
SCSI
Small Computer System Interface, a technological standard that defines
connections between computers and peripheral devices.
SCSI Adapters
Storage controllers for managing SCSI devices.
SCSI Drive
A disk drive equipped with a SCSI interface (sometimes referred to as a
SCSI Disk). Each disk drive will be assigned a SCSI address (or SCSI ID),
which is a number from 0 to 7 (0 to 15 under wide or Ultra SCSI). The SCSI
address uniquely identifies the drive on the SCSI bus or channel.
SCSI Drive States
Refers to a SCSI drive’s current operational status. At any given time, a SCSI
drive can be in one of five states:
Ready , Online , Standby , Dead , or Rebuild .
The controller stores the state of the attached SCSI drives in its non-volatile
memory. This information is retained even after power-off. Hence, if a SCSI
disk is labeled “dead” in one session, it will stay in the “dead” state until a
change is made either by using a system level utility or after a rebuild. Each
state is described below:
Ready: A SCSI disk drive is in a “ready” state if it is powered on and is
available to be configured during the current session but remains
unconfigured.
Online: A SCSI disk drive is in an “online” state if is powered on, has been
defined as a member of a drive group, and is operating properly.
Standby: A SCSI disk drive is in a “standby” state if it is powered on, is able
to operate properly, and was
NOT
defined as part of any drive group.