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On woensdag 14 augustus 2019 10:14:31 CEST Stefan G. Weichinger wrote: |
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> Am 14.08.19 um 08:36 schrieb J. Roeleveld: |
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> > Stefan, |
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> > |
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> > On maandag 29 juli 2019 21:28:50 CEST Stefan G. Weichinger wrote: |
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> >> At a customer I have to check through an older gentoo server. |
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> >> |
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> >> The former admin is not available anymore and among other things I have |
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> >> to check how the SAN storage is attached. |
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> > |
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> > If you ever encounter that admin, make sure you hide the body :) |
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> |
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> I only learn day by day what a mess all that is ... |
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If there is no documentation, it is a mess by definition. |
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> >> I see two devices sdc and sdd that should come from the SAN. |
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> > |
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> > Interesting, are these supposed to be the same? |
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> |
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> No, I don't think so. But maybe you'r right. No sdd in fstab or in the |
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> mounts at all and ... |
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See next item, make sure you do NOT mount both at the same time. |
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> > what do you get back from: |
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> > |
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> > # /usr/bin/sg_vpd --page=di /dev/sdc |
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> > # /usr/bin/sg_vpd --page=di /dev/sdd |
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> > (As suggested in the multipathd.conf file you listed above) |
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> |
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> these 2 look similar to me: |
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> |
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> samba ~ # /usr/bin/sg_vpd --page=di /dev/sdc |
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> Device Identification VPD page: |
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> Addressed logical unit: |
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> designator type: NAA, code set: Binary |
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> 0x600c0ff0001e91b2c1bae25601000000 |
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> samba ~ # /usr/bin/sg_vpd --page=di /dev/sdd |
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> Device Identification VPD page: |
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> Addressed logical unit: |
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> designator type: NAA, code set: Binary |
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> 0x600c0ff0001e91b2c1bae25601000000 |
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> |
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> > If "sdc" and "sdd" are the same disk, the "Adressed logical unit" id |
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> > should be the same for both. |
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> |
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> So we have 0x600c0ff0001e91b2c1bae25601000000 twice, right? |
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Yes, IOW, the same device/LUN/whatever. |
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Do NOT mount both at the same time EVER |
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> There's a /dev/sdb as well, commented in fstab with "9750-8i Raid6 |
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> (4x3TB + 2x4TB)" but that seems another "branch" of devices: |
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> |
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> # /usr/bin/sg_vpd --page=di /dev/sdb |
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> Device Identification VPD page: |
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> Addressed logical unit: |
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> designator type: NAA, code set: Binary |
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> 0x600605b00d0ce810217ccffe19f851e8 |
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Yes, this one is different. |
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I checked the above ID and it looks like it is already correctly configured. |
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Is " multipathd " actually running? |
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If it were running correctly, you would mount " /dev/mapper/.... " instead of |
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" /dev/sdc " or " /dev/sdd ". |
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> In the first week of september I travel there and I have the job to |
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> reinstall that server using Debian Linux (yes, gentoo-users, I am |
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> getting OT here ;-)). |
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For something that doesn't get updated/managed often, Gentoo might not be the |
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best choice, I agree. |
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I would prefer Centos for this one though, as there is far more info on |
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multipath from Redhat. |
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