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Solaris Volume Manager Administration Guide
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Document Information


1.  Getting Started With Solaris Volume Manager

2.  Storage Management Concepts

3.  Solaris Volume Manager Overview

4.  Solaris Volume Manager for Sun Cluster (Overview)

5.  Configuring and Using Solaris Volume Manager (Scenario)

6.  State Database (Overview)

7.  State Database (Tasks)

8.  RAID-0 (Stripe and Concatenation) Volumes (Overview)

9.  RAID-0 (Stripe and Concatenation) Volumes (Tasks)

10.  RAID-1 (Mirror) Volumes (Overview)

Overview of RAID-1 (Mirror) Volumes

Overview of Submirrors

Scenario--RAID-1 (Mirror) Volume

Providing RAID-1+0 and RAID-0+1

RAID-1 Volume (Mirror) Resynchronization

Full Resynchronization

Optimized Resynchronization

Partial Resynchronization

Creating and Maintaining RAID-1 Volumes

Configuration Guidelines for RAID-1 Volumes

Performance Guidelines for RAID-1 Volumes

About RAID-1 Volume Options

RAID-1 Volume Read-and-Write Policies

Pass Number

Understanding Submirror Status to Determine Maintenance Actions

The Affect of Booting Into Single-User Mode on RAID-1 Volumes

Scenario--RAID-1 Volumes (Mirrors)

11.  RAID-1 (Mirror) Volumes (Tasks)

12.  Soft Partitions (Overview)

13.  Soft Partitions (Tasks)

14.  RAID-5 Volumes (Overview)

15.  RAID-5 Volumes (Tasks)

16.  Hot Spare Pools (Overview)

17.  Hot Spare Pools (Tasks)

18.  Disk Sets (Overview)

19.  Disk Sets (Tasks)

20.  Maintaining Solaris Volume Manager (Tasks)

21.  Best Practices for Solaris Volume Manager

22.  Top-Down Volume Creation (Overview)

23.  Top-Down Volume Creation (Tasks)

24.  Monitoring and Error Reporting (Tasks)

25.  Troubleshooting Solaris Volume Manager (Tasks)

A.  Important Solaris Volume Manager Files

B.  Solaris Volume Manager Quick Reference

C.  Solaris Volume Manager CIM/WBEM API


The Affect of Booting Into Single-User Mode on RAID-1 Volumes

Sometimes, you may need to boot a system with mirrors for root (/), /usr, and swap, the so-called “boot” file systems, into single-user mode (by using the boot -s command). In this case, these mirrors and possibly all mirrors on the system will appear in the “Needing Maintenance” state when viewed with the metastat command. Furthermore, if writes occur to these slices, the metastat command shows an increase in dirty regions on the mirrors.

This situation appears to be potentially dangerous. However, the metasync -r command, which normally runs during boot to resynchronize mirrors, is interrupted when the system is booted into single-user mode. Once the system is rebooted, the metasync -r command will run and resynchronize all mirrors.

If this situation is a concern, you can run the metasync -r command manually.