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)
8. RAID-0 (Stripe and Concatenation) Volumes (Overview)
9. RAID-0 (Stripe and Concatenation) Volumes (Tasks)
Creating RAID-0 (Stripe) Volumes
How to Create a RAID-0 (Stripe) Volume
Creating RAID-0 (Concatenation) Volumes
How to Create a RAID-0 (Concatenation) Volume
10. RAID-1 (Mirror) Volumes (Overview)
11. RAID-1 (Mirror) Volumes (Tasks)
12. Soft Partitions (Overview)
16. Hot Spare Pools (Overview)
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
To add storage capacity to a file system, create a concatenation volume. To add storage capacity to an existing stripe, create a concatenated stripe volume.
Caution - Do not create volumes larger than 1Tbyte if you expect to run the Solaris software with a 32-bit kernel. Additionally, do not create volumes larger than 1 Tbyte if you expect to use a version of the Solaris OS prior to the Solaris 9 4/03 release. See Overview of Multi-Terabyte Support in Solaris Volume Manager for more information about multi-terabyte volume support in Solaris Volume Manager. |
Check Prerequisites for Creating Solaris Volume Manager Components and Background Information for Creating RAID-0 Volumes.
# umount /filesystem
From the Enhanced Storage tool within the Solaris Management Console, open the Volumes node. Choose Action⇒Create Volume, then follow the instructions in the wizard. For more information, see the online help.
Use the following form of the metainit command:
# metainit volume-name number-of-stripes components-per-stripe component-names
Specifies is the name of the volume to create.
Specifies the number of stripes to create.
Specifies the number of components each stripe should have.
Specifies the names of the components that are used. If more than one component is used, separate each component with a space.
For more information, see the metainit(1M) man page.
# mount /filesystem
Example 9-5 Expanding a File System by Creating a Concatenation
# umount /docs # metainit d25 2 1 c0t1d0s2 1 c0t2d0s2 d25: Concat/Stripe is setup (Edit the /etc/vfstab file so that the file system references the volume d25 instead of slice c0t1d0s2) # mount /docs
This example shows the creation of a concatenation, d25, out of two slices, /dev/dsk/c0t1d0s2 (which contains a file system mounted on /docs) and /dev/dsk/c0t2d0s2. The file system must first be unmounted. Note that the first slice in the metainit command must be the slice that contains the file system. If not, you will corrupt your data.
Next, the entry for the file system in the /etc/vfstab file is changed (or entered for the first time) to reference the concatenation. For example, initially, the following line appears in the /etc/vfstab file:
/dev/dsk/c0t1d0s2 /dev/rdsk/c0t1d0s2 /docs ufs 2 yes -
This line should be changed to the following:
/dev/md/dsk/d25 /dev/md/rdsk/d25 /docs ufs 2 yes -
Finally, the file system is remounted.
For a UFS file system, run the growfs command on the concatenation. See How to Expand a File System.
Some applications, such as a database, do not use a file system. An application such as a database uses the raw concatenation and must have its own way of recognizing the concatenation, or of growing the added space.
A concatenated stripe enables you to expand an existing stripe. For example, if a stripe has run out of storage capacity, you convert it into a concatenated stripe. Doing so allows you to expand your storage capacity without having to back up and restore data.
This procedure assumes that you are adding an additional stripe to an existing stripe.
Caution - Do not create volumes larger than 1Tbyte if you expect to run the Solaris software with a 32-bit kernel. Additionally, do not create volumes larger than 1 Tbyte if you expect to use a version of the Solaris OS prior to the Solaris 9 4/03 release. See Overview of Multi-Terabyte Support in Solaris Volume Manager for more information about multi-terabyte support in Solaris Volume Manager. |
Check Prerequisites for Creating Solaris Volume Manager Components and Background Information for Creating RAID-0 Volumes.
From the Enhanced Storage tool within the Solaris Management Console, open the Volumes node. Choose Action⇒Create Volume, then follow the instructions in the wizard. For more information, see the online help.
To concatenate existing stripes from the command line, use the following form of the metattach command:
# metattach volume-name component-names
Specifies the name of the volume to expand.
Specifies the names of the components that are used. If more than one component is used, separate each component with a space.
See the metattach(1M) man page for more information.
Example 9-6 Creating a Concatenated Stripe by Attaching a Single Slice
# metattach d2 c1t2d0s2 d2: components are attached
This example illustrates how to attach a slice to an existing stripe, d2. The system confirms that the slice is attached.
Example 9-7 Creating a Concatenated Stripe by Adding Several Slices
# metattach d25 c1t2d0s2 c1t2d1s2 c1t2d3s2 d25: components are attached
This example takes an existing three-way stripe, d25, and concatenates another three-way stripe to it. Because no interlace value is given for the attached slices, the stripes inherit the interlace value configured for d25. The system verifies that the volume has been set up.
For a UFS file system, run the growfs command on the volume. See How to Expand a File System.
Some applications, such as a database, do not use a file system. An application such as a database uses the raw volume and must have its own way of recognizing the volume, or of growing the added space.
To prepare a newly created concatenated stripe for a file system, see Chapter 18, Creating UFS, TMPFS, and LOFS File Systems (Tasks), in System Administration Guide: Devices and File Systems.