|
|
|
|
Linux DASD |
|
|
|
|
|
Partitioning DASD for Linux Guests Running under z/VM
Abstract Before DASD may be used by Linux on zSeries, the DASD volume must first be partitioned and formatted by Linux. This tip describes the necessary commands to partition and format DASD.
Contents Before a DASD volume may be accessed from Linux on zSeries, the volume must be formatted and partitioned by Linux. Use the dasdfmt command to format the DASD; use the fasd command to partition the DASD device.
In the following example, we first format DASD device /dev/dasda: # dasdfmt -f /dev/dasda -b 4096 -p
Drive Geometry: 3338 Cylinders * 15 Heads = 50070 Tracks I am going to format the device /dev/dasda in the following way:
Device number of device : 0x201 Labelling device : yes Disk label : VOL1 Disk identifier : 0X0201 Extent start (trk no) : 0 Extent end (trk no) : 48419 Compatible Disk Layout : yes Blocksize : 4096
--->> ATTENTION! <<--- All data of that device will be lost.
Type "yes" to continue, no will leave the disk untouched: yes Formatting the device. This may take a while (get yourself a coffee).
cyl 3338 of 3338 |##################################################| 100% Finished formatting the device. Rereading the partition table... ok
The "-f /dev/dasda" parameter specifies that the /dev/dasda device is to be formatted. A block size of 4096 bytes is used when formatting with the "-b 4096" parameter. The -p specifies that a progress bar is to bedisplayed. Once formatted, the DASD device can be partitioned using the fasd command, as shown:
# fdasd -a /dev/dasda auto-creating one partition for the whole disk... writing volume label... writing VTOC... rereading partition table...
The causes the command to operate non-interactively; a single partition will be created for the entire device.
|
|
| Home | Contact Tim | About | Links | |
