Change default values on ODM for Fibre

Hello Everybody …

Sometimes for performance recommendations or redundancy solutions, you will need to change some parameters on fibre card, like fc_err_recov & dyntrk

TEST_SERVER#lsattr -El fscsi0
attach       none      How this adapter is CONNECTED         False
dyntrk       yes       Dynamic Tracking of FC Devices        True+
fc_err_recov delayed FC Fabric Event Error RECOVERY Policy True+
scsi_id                Adapter SCSI ID                       False
sw_fc_class  3         FC Class for Fabric                   True

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Couldn’t canonicalise: Permission denied

If your work on AIX System (or any other UNIX/Linux Distribution), may be you face the following Message when you try to access SFTP:

Couldn't canonicalise: Permission denied
Need cwd

after many troubleshooting :
– user can access SSH without any problem.
– user can’t access SFTP
– you can switch on this user normally.

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Volume Group Descriptor Area (VGDA)

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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