Hi, I'm going to be involved in a migration of SAN islands to one big SAN. I've not worked with SANs before and I'm not sure how to approach this. I suspect the disk devices on the HP servers are going to change, when the EVA's and servers are plugged into this new Cisco 9509 switch.
Any... (0 Replies)
Hi everyone,
I wonder if I can canvas any opinions or thoughts (good or bad) on SAN attaching a SUN V880/490 to an EMC Clarion SAN?
At the moment the 880 is using 12 internal FC-AL disks as a db server and seems to be doing a pretty good job. It is not I/O, CPU or Memory constrained and the... (2 Replies)
hi all
just installed the netsec.options.tcpwrapper from expansion pack, which used to be a rpm, for my aix 6.1 test box.
it is so unpredictable. i set up the hosts.deny as suggested for all and allow the sshd for specific ip addresses/hostnames.
the tcpdchk says the hosts allowed and... (0 Replies)
I am going to do a SAN Array migration and need the sequence of steps required on the Solaris cluster before moving the old array luns to new array luns.
Here are the steps and I need info on the bold points:( I might even be wrong on the sequence of steps please correct me if I am wrong)
1.... (0 Replies)
Hi all,
We are migrating our SAN storage from HSV360 to 3PAR. The system runs aix 6.1 version with HACMP.
Please let me know what are requirements from OS side and how are the data copied to the new disks. (10 Replies)
Hi,
I am very new to HP-UX, and we're going to be doing a SAN migration.
We're going to take down the machine, and zone it to the new SAN.
My question is, will the device names change and will that interfere with the LVM?
If the new disks come in with different device names, how would I... (3 Replies)
I have an IBM blade running RHEL 5.4 server, connected to two Hitachi SANs using common fibre cards & Brocade switches. It has two volume groups made from old SAN LUNs. The old SAN needs to be retired so we allocated LUNs from the new SAN, discovered the LUNs as multipath disks (4 paths) and grew... (4 Replies)
I'm New to AIX / VIOS
We're doing a FC switch cutover on an ibm device, connected via SAN.
How do I tell if one path to my remote disk is lost? (aix lvm)
How do I tell when my link is down on my HBA port?
Appreciate your help, very much! (4 Replies)
I am working on VM host and collecting data to identify the type of storage attached to the server which will be migrated to VNX.
it has one ldom created on it
luxadm probe output ---
No Network Array enclosures found in /dev/es
Found Fibre Channel device(s):
Node... (7 Replies)
Am trying to copy a tar file onto a series of remote hosts and untar it at the destination. Need to do this without having to do multiple ssh.
Actions to perform within a single ssh session via shell script
- copy a file
- untar at destination (remote host)
OS : Linux RHEL6 (3 Replies)
Discussion started by: sankasu
3 Replies
LEARN ABOUT REDHAT
umount
UMOUNT(8) Linux Programmer's Manual UMOUNT(8)NAME
umount - unmount file systems
SYNOPSIS
umount [-hV]
umount -a [-dflnrv] [-t vfstype] [-O options]
umount [-dflnrv] dir | device [...]
DESCRIPTION
The umount command detaches the file system(s) mentioned from the file hierarchy. A file system is specified by giving the directory where
it has been mounted. Giving the special device on which the file system lives may also work, but is obsolete, mainly because it will fail
in case this device was mounted on more than one directory.
Note that a file system cannot be unmounted when it is `busy' - for example, when there are open files on it, or when some process has its
working directory there, or when a swap file on it is in use. The offending process could even be umount itself - it opens libc, and libc
in its turn may open for example locale files. A lazy unmount avoids this problem.
Options for the umount command:
-V Print version and exit.
-h Print help message and exit.
-v Verbose mode.
-n Unmount without writing in /etc/mtab.
-r In case unmounting fails, try to remount read-only.
-d In case the unmounted device was a loop device, also free this loop device.
-a All of the file systems described in /etc/mtab are unmounted. (With umount version 2.7 and later: the proc filesystem is not
unmounted.)
-t vfstype
Indicate that the actions should only be taken on file systems of the specified type. More than one type may be specified in a
comma separated list. The list of file system types can be prefixed with no to specify the file system types on which no action
should be taken.
-O options
Indicate that the actions should only be taken on file systems with the specified options in /etc/fstab. More than one option type
may be specified in a comma separated list. Each option can be prefixed with no to specify options for which no action should be
taken.
-f Force unmount (in case of an unreachable NFS system). (Requires kernel 2.1.116 or later.)
-l Lazy unmount. Detach the filesystem from the filesystem hierarchy now, and cleanup all references to the filesystem as soon as it is
not busy anymore. (Requires kernel 2.4.11 or later.)
THE LOOP DEVICE
The umount command will free the loop device (if any) associated with the mount, in case it finds the option `loop=...' in /etc/mtab, or
when the -d option was given. Any pending loop devices can be freed using `losetup -d', see losetup(8).
FILES
/etc/mtab table of mounted file systems
SEE ALSO umount(2), mount(8), losetup(8).
HISTORY
A umount command appeared in Version 6 AT&T UNIX.
Linux 2.0 26 July 1997 UMOUNT(8)