TheWon's IT Blog

Storage2013. 2. 21. 16:47

Path Selection Policy with ALUA

http://theithollow.com/2012/03/path-selection-policy-with-alua/

Posted by [TheWon]

HW/OS2012. 12. 26. 10:50

Comparison of file systems

http://en.wikipedia.org/wiki/Comparison_of_file_systems

Posted by [TheWon]

Storage2012. 12. 20. 10:53

hdisk and vpath correspondance for IBM SAN (shark)

hdisk and vpath correspondance for IBM SAN (shark)
Description Correspondance between phsical disks: 4 hdisk = 1 vpath = 1 physical disk To remove all vpaths run the command: # rmdev -dl dpo -R To remove all fibre channel disks (2 cards in this example): # rmdev -dl fscsi0 -R # rmdev -dl fscsi1 -R To recreate the hdisks run the command: # cfgmgr -vl fcs0 # cfgmgr -vl fcs1 To recreate the vpaths run the command: # cfallvpath To delete a device run this command: # rmdev -l fcs1 -d
Example rmdev -dl dpo -R ; rmdev -dl fscsi0 -R ; cfgmgr -vl fcs0 ; cfallvpath

http://www.coolcommands.com/index.php?option=com_cccat&task=display&id=46

Posted by [TheWon]

Information2012. 12. 5. 10:56

ping over a tcp connection

Example Output:

D:\tcping-devel>tcping www.reddit.com

Probing 72.14.204.104:80/tcp - Port is open - time=23.285ms
Probing 72.14.204.104:80/tcp - Port is open - time=21.651ms
Probing 72.14.204.104:80/tcp - Port is open - time=21.899ms
Probing 72.14.204.104:80/tcp - Port is open - time=21.789ms

Ping statistics for 72.14.204.104:80
     4 probes sent.
     4 successful, 0 failed.
Approximate trip times in milli-seconds:
     Minimum = 21.651ms, Maximum = 23.285ms, Average = 22.156ms

D:\tcping-devel>tcping -h www.elifulkerson.com
** Requesting "" from www.elifulkerson.com:
(for various reasons, kbit/s is an approximation)

Probing 64.22.103.201:80/tcp - HTTP is open - time=31.288ms rcv_time=31.951 status=200 bytes=4052 kbit/s=~1014.554
Probing 64.22.103.201:80/tcp - HTTP is open - time=29.553ms rcv_time=30.947 status=200 bytes=4052 kbit/s=~1047.479
Probing 64.22.103.201:80/tcp - HTTP is open - time=29.871ms rcv_time=31.727 status=200 bytes=4052 kbit/s=~1021.728
Probing 64.22.103.201:80/tcp - HTTP is open - time=29.976ms rcv_time=36.002 status=200 bytes=4052 kbit/s=~900.393

Ping statistics for 64.22.103.201:80
     4 probes sent.
     4 successful, 0 failed.
Approximate trip times in milli-seconds:
     Minimum = 29.553ms, Maximum = 31.288ms, Average = 30.172ms