Intel 273561-003 manual RAID Array Drive Roaming

Hardware Specifications and Features

Table 3-4. Supported SCSI Device Standards

			Maximum Cable
SCSI Drive	Speed	Bus Width	Length (meters) (1)		Adapter Maximum
Standard	(MB/Sec)	(Bits)	Single-		Devices per SCSI
				LVD	Channel
			Ended
Wide Ultra 2 (4)	80	16	(4)	12	16
Ultra160 (Ultra 3)	160	16	(4)	12	16
Ultra320	320	16	(4)	12	16

Notes:

1. May be exceeded in Point-to-Point and engineered specific applications.

2. Use of the word "Narrow", preceding SCSI, Ultra SCSI, or Ultra2 SCSI (for example, Narrow SCSI) is optional.

3. LVD was not defined in the original SCSI standards for this speed. If all devices on the bus support LVD, then 12-meters operation is possible at this speed. However, if any device on the bus is singled-ended only, then the entire bus switches to single-ended mode and the distances in the single-ended column apply.

4. Single-ended is not defined for speeds beyond Ultra. After Ultra2 all new speeds are wide only.

3.3.2Support for Non-Hard-Disk-Drive SCSI Devices (Non-Direct- Access Devices)

The RAID controller will pass through to the host operating system direct access to non- direct-access SCSI devices which are connected to a SCSI bus (channel) of the RAID controller. The RAID controller passes through all control of these devices to the host operating system.

Types of supported non-Direct-Access SCSI devices (this does not cover specific vendors and models):

•SAF-TE Processors

•Tape Backups

•CD-ROMs

3.4RAID Array Drive Roaming

Array Roaming allows the user the ability to move a complete RAID array from one computer system to another computer system and preserve the RAID configuration information and user data on that RAID array. ††Compatible RAID controllers must control the RAID subsystems of the two computer systems (see list of compatible controllers in this section). The transferred RAID array may be brought online while the target server continues to run if the hard disk drives and disk enclosure support hot plug capabilities; however, not all operating systems support this feature. The hard disk drives are not required to have the same SCSI ID in the target system that they did in the original system that they are removed from. The RAID array drive that is being roamed must not be of type Private. This includes all non-private host, array, and logical drives.

20 Hardware Installation and User’s Guide