February, 2015Archive for
Thursday, February 26th, 2015
use the following command to remotely eject the tap from a tap device to minimize your time & safe your data:
#mt offline
it will eject the tap from the default device tap unit “rmt0”.
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Tags: device, eject, mt, offline, TAP, unit
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Thursday, February 26th, 2015
try this command to list files from a mksysb tap:
#lsmksysb
the previous command will list from the default tap device “rmt0”.
if you have another tap, try the following:
#lsmksysb -f /dev/rmt5
Tags: device, how, list, lsmksysb, rmt, show, TAP
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Thursday, February 19th, 2015
Use the following command to rename a device:
# rendev -l hdisk4 -n hdisk53
where the ‘hdisk4’ is your device and ‘hdisk53’ is the new name.
HINT: The device must be free
Tags: AIX, device, rename, rendev
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Thursday, February 19th, 2015
Here are the commands related to error demon in AIX
To stop logging run the below command
#/usr/lib/errstop
To get rid of that log.
# rm /var/adm/ras/errlog
To restart the daemon, thus creating a new error log
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Tags: AIX, demon, errdemon, errpt, log, logging
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Friday, February 13th, 2015
Information about which PPs that are stale and which PVs are missing within a VG. The LVM and SCSI driver reserves somewhere between 7-10% of the available disk space for LVM maps, etc.
Ref:
http://www.datadisk.co.uk/html_docs/hp/aix_lvm.htm
Tags: AIX, group, LVM, Status, VGSA, volume
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Friday, February 13th, 2015
Information about all the LVs and PVs within a VG. The first 64K of a PV is reserved for this area – defined in <sys/bootrecord.h>.
The VGDA consists of
- BOOTRECORD: – first 512 bytes. Allows the Read Only System (ROS) to boot system
- BAD BLK DIRECTORY – found in <sys/bddir.h>
- LVM RECORD – found in <lvmrec.h>
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Tags: AIX, group, LVM, vgda, volume
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Friday, February 13th, 2015
You can find below the meaning of each parameter on Volume Group Characteristics (the output from lsvg vg command):
- Volume Group: Name of Volume Group.
- VG State: active/partial. Partial indicates that some of the Physical Volumes in the Volume Group are not active.
- VG Permission: It indicates if the volume group is read-only or read-write.
- Max LVs: Maximum number of Logical Volumes allowed in Volume Group.
- LVs: Total number of Logical Volumes at present in Volume Group.
- Open LVs: Number of LVs open at present in the Volume Group for any Read Write operation.
- Total PVs: Total number of Physical Volumes present in Volume Group.
- Stale PVs: How many stale Physical Volumes are there in Volume Group. The stale Physical Volumes are those ones on which I/O operations are not possible.
- Active PVs: Total number of Physical Volumes which are active in Volume Group.
- Max PPs per VG: Maximum no. of Physical Partitions which can be there in the Volume Group.
- Max PPs per PV: Maximum number of Physical Partitions which can be there in Physical Volume.
- VG Identifier: The very long string to identify Volume Group.
- PP Size: The size of Physical Partition used in every Physical Volume of Volume Group.
- Total PPs: Total number of Physical Partitions in Volume Group.
- Free PPs: Total number of free Physical Partitions with in Volume Group.
- Used PPs: Total number of Physical Partitions in use in Volume Group.
- Quorum: Whether the quorum is on or not in Volume Group.
- VG Descriptors: Number of Volume Group Descriptor Areas(VGDA) in Volume Group.
- Stale PPs: How many Physical Partitions are stale or unable to perform I/O operations.
- Auto On: Whether the Volume Group will varyon on system startup or not.
- Max PVs: Maximum number of Physical Volumes allowed in this Volume Group.
- Auto Sync: Whether this Volume Group should sync automatically or not.
- BB Policy: Its bad block relocation policy. So, this value here is relocatable, that means we are allowed to relocate bad blocks in this Volume Group if need be.
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Tags: AIX, characteristics, descriptors, group, lps, pps, quorum, stale, vgda, volume
Posted in AIX, Information Management | No Comments »
Monday, February 9th, 2015
most of us has confused between the network devices en, et & ent, you can read the following to put a limit for this confusion 🙂 :
ent:
The notation ent is used to specify the hardware adapter. It has nothing to do with the TCP/IP address.
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Tags: AIX, en, ent, et, inet, ip, TCP
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