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Handon21
Hand-On Twenty One
Working with Hard Disks
1. Examine the output of the format utility below and answer the following question:
#format
AVAILABLE DISK SELECTIONS:
0.c0t3d0 <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
/iommu@0,10000000 /sbus@1,10001000 /espdma@5,8400000/ esp@5,8800000/
sd@3,0
Specify disk (enter its number):
A. How many hard disks are available on the system? 1
B. What are their capacities? 2.1GB
C. What are their logical name? c0t3d0
D. What are their marketing names (model number)? SUN2.1G
E. What are their physical device names? 0
F. Are the disk SCSI or IDE? SCSI
2. Examine the output of the format utility below and answer the following question:
#format
AVAILABLE DISK SELECTIONS:
0. c0d0 <SUN1.2G cyl 615 alt 2 hd 64 sec 63>
/pci@0,0/pci@7,1/ata@0/cmdk@0,0
1. c0d1 <SUN1.05G cyl 522 alt 2 hd 32 sec 63>
/pci@0,0/pci-ide@7,1/ata@0/cmdk@1,0
A. How many hard disks are available on the system? 2
B. What are their capacities? 1.2G & 1.05G
C. What are their logical name? c0d0 & c0d1
D. What are their marketing names (model number)? SUN1.2G & SUN1.05G
E. What are their physical device names? 0 & 1
F. Are the disk SCSI or IDE? both are IDE
3. Become super-user. Start the format utility.
#format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c0t0d0
/pci@1f,0/pci@1,1/ide@3/dad@0,0
1. c0t1d0 FunClass
/pci@1f,0/pci@1,1/ide@3/dad@1,0
Specify disk (enter its number):
4. Enter the number of the disk that you want to format from the list displayed on your screen, in our lab: 1
Specify disk (enter its number): 1
selecting c0t1d0: FunClass
[disk formatted, no defect list found]
FORMAT MENU:
disk - select a disk
type - select (define) a disk type
partition - select (define) a partition table
current - describe the current disk
format - format and analyze the disk
repair - repair a defective sector
show - translate a disk address
label - write label to the disk
analyze - surface analysis
defect - defect list management
backup - search for backup labels
verify - read and display labels
save - save new disk/partition definitions
volname - set 8-character volume name
! - execute , then return
quit
format>
5. To begin formatting the disk, enter the format at the format> prompt. What is the time estimate for formatting this disk
format> format
Cannot format this drive. Please use your Manufacturer supplied formatting utility.
format>
6. Type n to exit the format option and then q to exit format utility.
format> q
7. Display disk slices on your system disk (disk 0).
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c0t0d0
/pci@1f,0/pci@1,1/ide@3/dad@0,0
1. c0t1d0 FunClass
/pci@1f,0/pci@1,1/ide@3/dad@1,0
Specify disk (enter its number): 1 0
selecting c0t0d0
[disk formatted, no defect list found]
Warning: Current Disk has mounted partitions.
FORMAT MENU:
disk - select a disk
type - select (define) a disk type
partition - select (define) a partition table
current - describe the current disk
format - format and analyze the disk
repair - repair a defective sector
show - translate a disk address
label - write label to the disk
analyze - surface analysis
defect - defect list management
backup - search for backup labels
verify - read and display labels
save - save new disk/partition definitions
volname - set 8-character volume name
! - execute , then return
quit
format> partition
PARTITION MENU:
0 - change `0' partition
1 - change `1' partition
2 - change `2' partition
3 - change `3' partition
4 - change `4' partition
5 - change `5' partition
6 - change `6' partition
7 - change `7' partition
select - select a predefined table
modify - modify a predefined partition table
name - name the current table
print - display the current table
label - write partition map and label to the disk
! - execute , then return
quit
partition>
8. How many slices are there on your system disk? Record their size, starting and ending cylinders:
partition> print
Current partition table (original):
Total disk cylinders available: 8892 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 277 128.28MB (278/0/0) 262710
1 var wm 278 - 832 256.09MB (555/0/0) 524475
2 backup wm 0 - 8891 4.01GB (8892/0/0) 8402940
3 swap wu 833 - 1387 256.09MB (555/0/0) 524475
4 unassigned wm 0 0 (0/0/0) 0
5 unassigned wm 1388 - 4422 1.37GB (3035/0/0) 2868075
6 usr wm 4423 - 6642 1.00GB (2220/0/0) 2097900
7 home wm 6643 - 8891 1.01GB (2249/0/0) 2125305
9. Exit partition menu and format utility. Now examine system's disk label by issuing the following command:
partition> quit
format> q
# prtvtoc /dev/rdsk/c0t0d0s2
* /dev/rdsk/c0t0d0s2 partition map
*
* Dimensions:
* 512 bytes/sector
* 63 sectors/track
* 15 tracks/cylinder
* 945 sectors/cylinder
* 8894 cylinders
* 8892 accessible cylinders
*
* Flags:
* 1: unmountable
* 10: read-only
*
* First Sector Last
* Partition Tag Flags Sector Count Sector Mount Directory
0 2 00 0 262710 262709 /
1 7 00 262710 524475 787184 /var
2 5 00 0 8402940 8402939
3 3 01 787185 524475 1311659
5 0 00 1311660 2868075 4179734 /opt
6 4 00 4179735 2097900 6277634 /usr
7 8 00 6277635 2125305 8402939 /export/home
10. Notice the different between the output from step 8 and step 9. What additional information is reported by the
prtvtoc utility?
-In step 8: it show cylinders, size and blocks.
-In step 9: it show more detail (first sector, sector count and mount directory.