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At a customer I have to check through an older gentoo server. |
| 2 |
|
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The former admin is not available anymore and among other things I have |
| 4 |
to check how the SAN storage is attached. |
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|
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As I have to plan a new installation with minimal downtime I'd like to |
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understand that multipath-stuff before any changes ;-) |
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|
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The system runs: |
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|
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sys-fs/multipath-tools-0.5.0-r1 |
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|
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and has a multipath.conf: |
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|
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(rm-ed comments) |
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|
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defaults { |
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# udev_dir /dev |
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polling_interval 15 |
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# selector "round-robin 0" |
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path_grouping_policy group_by_prio |
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failback 5 |
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path_checker tur |
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# prio_callout "/sbin/mpath_prio_tpc /dev/%n" |
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rr_min_io 100 |
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rr_weight uniform |
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no_path_retry queue |
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user_friendly_names yes |
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|
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} |
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blacklist { |
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devnode cciss |
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devnode fd |
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devnode hd |
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devnode md |
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devnode sr |
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devnode scd |
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devnode st |
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devnode ram |
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devnode raw |
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devnode loop |
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devnode sda |
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devnode sdb |
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} |
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|
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multipaths { |
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multipath { |
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wwid 3600c0ff0001e91b2c1bae25601000000 |
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## To find your wwid, please use /usr/bin/sg_vpd --page=di /dev/DEVICE. |
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## The address will be a 0x6. Remove the 0x and replace it with 3. |
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alias MSA2040_SAMBA_storage |
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} |
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} |
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|
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|
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|
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|
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|
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"multipath -l" and "-ll" show nothing. |
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|
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dmesg: |
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|
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# dmesg | grep multi |
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[ 1.144947] md: multipath personality registered for level -4 |
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[ 1.145679] device-mapper: multipath: version 1.9.0 loaded |
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[ 1.145857] device-mapper: multipath round-robin: version 1.0.0 loaded |
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[21827451.284100] device-mapper: table: 253:0: multipath: unknown path |
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selector type |
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[21827451.285432] device-mapper: table: 253:0: multipath: unknown path |
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selector type |
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[21827496.130239] device-mapper: table: 253:0: multipath: unknown path |
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selector type |
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[21827496.131379] device-mapper: table: 253:0: multipath: unknown path |
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selector type |
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[21827497.576482] device-mapper: table: 253:0: multipath: unknown path |
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selector type |
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|
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- |
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|
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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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Could someone help me to research this in more detail? |
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|
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This is a production server, I can't change much ... |
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|
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I would like to find out how to reliably mount these SAN-devices into a |
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new OS (maybe a new gentoo installation is coming). |
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|
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thanks, Stefan |
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