Hello,
I need explanations about physical disks and physical volumes. What is the difference between these 2 things?
In fact, i am trying to understand what the AIX lspv2command does.
Thank you in advance. (2 Replies)
I was in smit, checking on disc space, etc. and it appears that one of our physical volumes that is part of a large volume group, has no free physical partitions. The server is running AIX 5.1. What would be the advisable step to take in this instance? (9 Replies)
Hi!
Can anyone help me on how I can do a basic check on the Unix filesystems / physical volumes and logical volumes?
What items should I check, like where do I look at in smit? Or are there commands that I should execute?
I need to do this as I was informed by IBM that there seems to be... (1 Reply)
Hi,
Someone please help me with how i can unmount and remove all the files systems from a cluster. This is being shared by two servers that are active_standby. (3 Replies)
Is it possible to use zvol from SAN LUN to install LDOM OS ? I 'm using following VDS from my service domain
VDS
NAME LDOM VOLUME DEVICE
primary-vds0 primary iso sol-10-u6-ga1-sparc-dvd.iso
cdrom ... (16 Replies)
Hi,
I am new to unix. I am working on Red Hat Linux and side by side on AIX also. After reading the concepts of Storage, I am now really confused regarding the terminologies
1)Physical Volume
2)Volume Group
3)Logical Volume
4)Physical Partition
Please help me to understand these concepts. (6 Replies)
I'd like to finish setting up this system and then move the secondary or primary disk to another system that is the exact same hardware.
I've done things like this in the past with ufs and disk suite mirroring just fine. But I have yet to do it with a zfs root pool mirror.
Are there any... (1 Reply)
When installing Linux, I choose some default setting to use all the disk space.
My server has a single internal 250Gb SCSI disk. By default the install appears to have created 3 logical volumes
lv_root, lv_home and lv_swap.
fdisk -l shows the following
lab3.nms:/dev>fdisk -l
Disk... (2 Replies)
I want to remove hdisk1 from volume group diskpool_4 and migrate PV from hdisk1 to hdisk2 , but facing problems, so what is the quickest way to migratepv and remove hdisk1 --
# lspv | grep diskpool_4
hdisk1 00c7780e2e21ec86 diskpool_4 active
hdisk2 ... (2 Replies)
I have a guest LDOM running Solaris 10U11 on a Sun T4-1 host running Solaris 11.4. The host has a disk named bkpool that I'd like to share with the LDOM so both can read and write it. The host is hemlock, the guest is sol10.
root@hemlock:~# zpool list
NAME SIZE ALLOC FREE CAP DEDUP ... (3 Replies)
Discussion started by: Michele31416
3 Replies
LEARN ABOUT HPUX
format
format(1M)format(1M)NAME
format - format an HP SCSI disk array LUN
SYNOPSIS
device_file
DESCRIPTION
formats one LUN of the HP SCSI disk array associated with device file, device_file. The format will usually be a soft or zeroing format,
in which the controller writes zeroes to the data area and parity area, if any, of the LUN.
NOTE: The above should always be true of a sub-LUN, but the controller might decide, based on certain conditions, to do a full format of a
regular LUN, which consists of sending a mode select and a media initialization command to the physical drive(s) in question, fol-
lowed by zeroing the data and parity area, if any. The conditions which will cause a full format to be done are as follows:
1. The controller received a Mode Select command which requires a drive sector size change.
2. The controller received a Mode Select command which changed a parameter in the Format Device Page(0x03).
3. The LUN contains one or more failed drives. In this case only a certain subset of the drives containing the failed drives
will be formatted.
4. Either the FmtData or the CmpLst bit in the Format Unit CDB is set.
RETURN VALUE
returns the following values:
0 Successful completion.
-1 Command failed.
DIAGNOSTICS AND ERRORS
Errors can originate from problems with:
o
o SCSI (device level) communications
o system calls
Error messages generated by format:
An error in command syntax has occurred.
Enter command again with all required arguments, in the order shown.
To ensure that
does not modify a disk array that is being used by another process, attempts to obtain exclusive access to the disk array. If the
disk array is already opened by another process (for example, LVM -- the Logical Volume Manager), a "" error message is returned by
the driver. To eliminate the "" condition, determine what process has the device open. In the case of LVM, it is necessary to
deactivate the volume group containing the array before formatting array LUNs (see vgchange(1M)).
The LUN number, which is derived from the device file name, is out of range.
The addressed LUN
is not configured, and thus is not known to the array controller.
Utilities must be able to open the device file for raw access.
The device being addressed is not an HP SCSI disk array.
SCSI (device level) communication errors:
Sense data associated with the failed operation is printed.
Error messages generated by system calls:
uses the following system calls:
and
Documentation for these HP-UX system calls contains information about the specific error conditions associated with each call. does not
alter the value of The interpretation of for printing purposes is performed by the system utility
EXAMPLES
To format the HP SCSI disk array LUN on a Series 800:
WARNING
The command will destroy all user data on the addressed LUN.
DEPENDENCIES
The HP C2425 and HP C2427 disk arrays are only supported on Series 700 systems running HP-UX version 9.0X.
The HP C2430 disk array is supported on Series 700 and 800 systems running HP-UX versions 9.0X and 10.0X.
AUTHOR
was developed by HP.
format(1M)