Labeling a disk is usually done during system installation or when you are creating new disk slices. You may need to relabel a disk if the disk label is corrupted (for example, from a power failure).
The format utility will attempt to automatically configure any unlabeled SCSI disk. If format is able to automatically configure an unlabeled disk, it will display a message like the following:
c1t0d0:configured with capacity of 404.65MB |
Become superuser.
Enter the format utility.
# format |
Enter the number of the disk that you want to label from the list displayed on your screen.
Specify disk (enter its number):1 |
Use the table below to determine how to label the disk.
If the Disk Is Unlabeled and Was Successfully Configured ... |
If the Disk Was Labeled and You Want to Change the Type, or Format Was Not Able to Automatically Configure the Disk ... |
---|---|
Format will ask if you want to label the disk. Go to step 5 to label the disk. |
You must specify the disk type. Go to steps 6-7 to set the disk type and label the disk. |
Label the disk by typing y at the Label it now? prompt.
Disk not labeled. Label it now? y |
The disk is now labeled. Go to step 10 to exit the format utility.
Enter type at the format> prompt.
format> type |
Format displays the Available Drive Types menu.
Select a disk type from the list of possible disk types.
Specify disk type (enter its number)[8]: 8 |
Label the disk. If the disk is not labeled, the following message is displayed.
Disk not labeled. Label it now? y |
Otherwise you are prompted with this message:
Ready to label disk, continue? y |
Use the verify command from the format main menu to verify the disk label.
format> verify |
Exit the format utility by typing q at the format> prompt.
partition> q format> q # |
The following example automatically configures and labels a 424-Mbyte disk.
# format c1t0d0: configured with capacity of 404.65MB AVAILABLE DISK SELECTIONS: 0. c0t3d0 <SUN0424 cyl 1151 alt 2 hd 9 sec 80> /sbus@1,f8000000/esp@0,800000/sd@3,0 1. c1t0d0 <SUN0424 cyl 1151 alt 2 hd 9 sec 80> /sbus@1,f8000000/QLGC,isp@1,10000/sd@0,0 Specify disk (enter its number): 1 Disk not labeled. Label it now? yes format> verify # |
Examine disk label information by using the prtvtoc(1M) command. See Chapter 21, Disk Management (Overview) for a detailed description of the disk label and the information displayed by the prtvtoc command.
Become superuser.
Display the disk label information by using the prtvtoc command.
# prtvtoc /dev/rdsk/device-name |
device-name |
Raw disk device you want to examine. |
The following example shows the disk label information for disk /dev/rdsk/c0t0d0s0.
# prtvtoc /dev/rdsk/c0t0d0s0 * c0t0d0s0 partition map * * Dimensions: * 512 bytes/sector * 36 sectors/track * 9 tracks/cylinder * 324 sectors/cylinder * 1272 cylinders * 1254 accessible cylinders * * Flags: * 1: unmountable * 10: read-only * * First Sector Last * Partition Tag Flags Sector Count Sector Mount Directory 0 2 00 0 37260 37259 / 1 3 01 37260 77760 115019 2 5 00 0 406296 406295 6 4 00 115020 283824 398843 /usr 7 6 00 398844 7452 406295 /export/home # |