HP 3PAR RedHat and Oracle Linux Implementation Guide

File system type? [ext2]? ext4
Start? 0
End? -0
(parted) p
Model: 3PARdata VV (scsi)
Disk /dev/sdh: 5.37GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 0.02GB 5.37GB 5.35GB primary ext4
(parted) unit s
(parted) p
Model: 3PARdata VV (scsi)
Disk /dev/sdh: 10485760s
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 32768s 10485759s 10452992s primary ext4
(parted) unit mb
(parted) print
Model: 3PARdata VV (scsi)
Disk /dev/sdh: 5369MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 16.8MB 5369MB 5352MB primary ext4
If you are running HP 3PAR OS 2.3.1 with RHEL 6.x, then for proper alignment, make sure to pass
sector 32768 as the start sector with the fdisk -c -u option, or use the appropriate unit to start
with (such as 16.8 MB) in a parted command.
WARNING! While using fdisk, make sure the correct underlying device is used. Use the
multipath command to identify the underlying device.
WARNING! All I/O creating the file system and mount points needs to be done using the
Device-mapper device nodes /dev/mapper/XXX.
Data corruption will occur if any I/O is attempted on /dev/sdX device nodes.
WARNING! Issuing the multipath -F command will flush out all the Device-mapper mapping
and can be very destructive if I/O is being served to any of the existing devices. Avoid using the
-F option.
Use kpartx to delete a Device-mapper instance and then use fdisk to delete the partition.
The Device-mapper node name represents the storage volume ID (excluding the first digit 3). Use
the HP 3PAR OS CLI showvv or showvlun commands to get the volume name it represents.
Example:
1. On your FC connected host run ls /dev/mapper.
# ls /dev/mapper
350002ac001b40031
Partitioning Device-mapper Nodes 121