WWN from MegaCli not always match with /dev/disk/by-id

[tclh123]

[louwrentius]

Can't reproduce this on my system and don't have access to any other systems. Feel free to add additional information an reopen this but on my system it's fine.

[tclh123]

Here is the output on my machine,

$ sudo megacli -pdlist -a0 | grep -E 'WWN|SAS A|Inquiry Data'
WWN: 5000C500588C2354
SAS Address(0): 0x5000c500588c2355
SAS Address(1): 0x0
Inquiry Data: SEAGATE ST3000NM0023    GS0DZ1Y1QY19
WWN: 5000039528E913D5
SAS Address(0): 0x5000039528e913d6
SAS Address(1): 0x0
Inquiry Data: TOSHIBA MG03SCA300      DG02Y3R0A1EUFVL9
WWN: 5000039528E91AE9
SAS Address(0): 0x5000039528e91aea
SAS Address(1): 0x0
Inquiry Data: TOSHIBA MG03SCA300      DG02Y3R0A1ITFVL9
WWN: 5000C50057AB6824
SAS Address(0): 0x5000c50057ab6825
SAS Address(1): 0x0
Inquiry Data: SEAGATE ST3000NM0023    GS0AZ1Y1115J
WWN: 5000039528E96471
SAS Address(0): 0x5000039528e96472
SAS Address(1): 0x0
Inquiry Data: TOSHIBA MG03SCA300      DG02Y3R0A2EIFVL9
WWN: 5000039528E913B1
SAS Address(0): 0x5000039528e913b2
SAS Address(1): 0x0
Inquiry Data: TOSHIBA MG03SCA300      DG02Y3R0A1EPFVL9
WWN: 5000039528E91EC9
SAS Address(0): 0x5000039528e91eca
SAS Address(1): 0x0
Inquiry Data: TOSHIBA MG03SCA300      DG02Y3R0A1NNFVL9
WWN: 5000039528E91B29
SAS Address(0): 0x5000039528e91b2a
SAS Address(1): 0x0
Inquiry Data: TOSHIBA MG03SCA300      DG02Y3R0A1J0FVL9
WWN: 5000039528E91EA1
SAS Address(0): 0x5000039528e91ea2
SAS Address(1): 0x0
Inquiry Data: TOSHIBA MG03SCA300      DG02Y3R0A1NCFVL9
WWN: 5000C50057DC251C
SAS Address(0): 0x5000c50057dc251d
SAS Address(1): 0x0
Inquiry Data: SEAGATE ST3000NM0023    GS0DZ1Y1DQLT
WWN: 5000039528E90EE1
SAS Address(0): 0x5000039528e90ee2
SAS Address(1): 0x0
Inquiry Data: TOSHIBA MG03SCA300      DG02Y3R0A1C5FVL9
WWN: 5000C5005910C97C
SAS Address(0): 0x5000c5005910c97d
SAS Address(1): 0x0
Inquiry Data: SEAGATE ST3000NM0023    GS0DZ1Y20LJ9

$ ls -l /dev/disk/by-id | grep -E 'wwn-[0-9a-z]* '
lrwxrwxrwx 1 root root  9 May 23 18:02 wwn-0x5000039528e90ee0 -> ../../sdk
lrwxrwxrwx 1 root root  9 May 23 18:02 wwn-0x5000039528e913b0 -> ../../sdf
lrwxrwxrwx 1 root root  9 May 23 18:02 wwn-0x5000039528e913d4 -> ../../sdb
lrwxrwxrwx 1 root root  9 May 23 18:02 wwn-0x5000039528e91ae8 -> ../../sdc
lrwxrwxrwx 1 root root  9 May 23 18:02 wwn-0x5000039528e91b28 -> ../../sdh
lrwxrwxrwx 1 root root  9 Jul 10 20:52 wwn-0x5000039528e91ea0 -> ../../sdi
lrwxrwxrwx 1 root root  9 May 23 18:02 wwn-0x5000039528e91ec8 -> ../../sdg
lrwxrwxrwx 1 root root  9 May 23 18:02 wwn-0x5000039528e96470 -> ../../sde
lrwxrwxrwx 1 root root  9 May 23 18:02 wwn-0x5000c50057ab6827 -> ../../sdd
lrwxrwxrwx 1 root root  9 Jul 10 20:53 wwn-0x5000c50057dc251f -> ../../sdj
lrwxrwxrwx 1 root root  9 Aug 21 18:38 wwn-0x5000c500588c2357 -> ../../sda
lrwxrwxrwx 1 root root  9 Oct 28 13:53 wwn-0x5000c5005910c97f -> ../../sdl

Do you have any idea about this difference?

[louwrentius]

Frankly I'm amazed, I don't know. A WWN should be unique. I would think that either this is a kernel module driver bug, or something is wrong with the utility. Maybe you can do this:

hdparm -I /dev/sda | grep -i wwn Logical Unit WWN Device Identifier: 5000cca23dd45619

And see what kind of WWNs you get then. I'm probably not able to do anything about this in the script.

[naisanza]

@louwrentius Have you been able to retrieve temperature data through other non-MegaCli utilities?

[louwrentius]

You can also use smartctl data. It is a bit slower.

On 1 apr. 2016, at 00:34, Eric [email protected] wrote:

@louwrentius Have you been able to retrieve temperature data through other non-MegaCli utilities?

— You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub

[arpit1997]

@louwrentius Few things that i would like to point out for this project.

• First and foremost is that a license should also be included in your project which is quite useful about how your code should be used.
• You should follow some common standard for your project like you can put all your source codes in a separate directory named src
• I saw that code does not follow a code style like PEP8 that should also be fixed so that it could be more readable. :smile_cat: :smile_cat: