Installation guide

The logging format and conﬁguration for DRL will not be compatible with

BCL; for example, DRL will require a log size of at least two blocks. The

next major release of Tru64 UNIX will automatically reconﬁgure volumes for

DRL when a BCL mirrored volume has a log of two or more blocks.

Mirrored volume conﬁgurations with a BCL of one block will require manual

reconﬁguration to continue to take advantage of logging for faster mirror

recovery.

Due to these changes, you can conﬁgure a BCL size of two or more blocks to

simplify BCL to DRL migration in the future. For optimum DRL

conﬁgurations, use the following guidelines when conﬁguring volumes with

BCL: use a BCL subdisk block size of one block plus an additional block for

every 1 GB of volume storage, then round up the BCL size to the next even

number. Table 8-2 shows some examples.

Table 8-2: BCL Conﬁguration Examples

Volume Size (GB) BCL Subdisk Size (Blocks)

<1 2

810

910

10 12

8.18 LSM volassist Command Syntax

In the next major release of Tru64 UNIX, the syntax of the volassist

command will change. It will no longer support the following constructs:

• [!]medianame,offset

You will still be able to use [!]medianame,offset construct but

you will not be able to specify an offset. If you need to specify an offset,

you will have to use the low-level commands to create subdisks, plexes,

and volumes exactly as required.

8–8 Features and Interfaces Scheduled for Retirement