Prepare notes on the logical storage manager, Programming Languages

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Question:

(i) Prepare brief notes on the Logical Storage Manager.

(ii) Show benefits that can be achieve by using the LSM Manager.

(iii) LSM organizes and optimizes disk usage and guards against media failures using the following objects:

(a) Volumes
(b)Plexes
and (c)Subdisks

Describe in details each of the above objects and show their relationship.

(iv) List the three types of disks available in digital UNIX.
(v) Write short notes on disk group.
(vi) If a disk that was in use by LSM fails to restart or has other hardware problems, the disk can be replaced by a new disk which has a different physical unit number than the failed disk. Below is the UNIX commands how to replace a disk that has a different unit number from that of the failed disk rz19 and disk rz19 belongs to the rootdg disk group as disk02. Assume that the spare disk available is as large as the rz19 disk.

(1)# voldg -g rootdg -k rmdisk disk02
(2)# voldisksetup -i rz20 privlen=1024 nconfig=1 nlogs=1
(3)# voldg -g rootdg -k adddisk disk02=rz20
(4)# volrecover -sb disk02


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