Lucent Technologies 585-210-940 manual Enterprise, computer, Introduction to Disk Mirroring

Introduction to Disk Mirroring	CentreVu CMS Release 3 Version 8 Disk-Mirrored Systems
How CMS implements disk mirroring	8

Mirror layout on a Sun On a Sun Enterprise 3500 platform, the mirror layout must always be

Enterprise 3500			based upon the bays in which the disks are installed. Submirrors 11, 15,
computer			and 19 are the disks in the lower bay (targets 0 through 3 on controller 0);
			submirrors 12,16, and 20 are the disks in the upper bay (targets 4
			through 7 on controller 1). The table below shows the mirror layout.
		mirror d13		mirror d21		mirror d17
						swap partition
		/ (root) filesystem		/cms filesystem
						(CMS r3v8)
	No.	submirror	submirror	submirror	submirror	submirror	submirror
	Disks	d11	d12	d19	d20	d15	d16
	2	c0t0d0s0	c1t4d0s0	c0t0d0s3	c1t4d0s3	c0t0d0s4	c1t4d0s4
	4	c0t0d0s0	c1t4d0s0	c0t0d0s3	c1t4d0s3	c0t0d0s4	c1t4d0s4
				c0t1d0s1	c1t5d0s1
				c0t0d0s3	c1t4d0s3
	6	c0t0d0s0	c1t4d0s0	c0t1d0s1	c1t5d0s1	c0t0d0s4	c1t4d0s4
				c0t2d0s1	c1t6d0s1
				c0t0d0s3	c1t4d0s3
	8	c0t0d0s0	c1t4d0s0	c0t1d0s1	c1t5d0s1	c0t0d0s4	c1t4d0s4
				c0t2d0s1	c1t6d0s1
				c0t3d0s1	c1t7d0s1

Required hardware In order for your CMS system to be mirrored, it must have the following hardware installed in addition to the hardware already installed:

●For a Sun Enterprise 3500 system, two GigaByte Interface Converter (GBIC) modules. One will be installed into the UA slot on the FC-AL Interface board, and the other will be installed into GBIC Port 1 on the Sbus I/O board (see the illustration on page 15).

●For a Sun Enterprise 3500 system, a fiber cable to connect the UA port GBIC to GBIC Port 1 on the I/O board.

●Twice the number of disk drives needed for an unmirrored system. All the disks must be the same size.