But don't forget that "The unknown is what makes life interesting" :)

Bruno

Cindy Swearingen wrote:
> Hi Mike,
>
> In theory, this should work, but I don't have an experience with this
> particular software, maybe someone else does.
>
> One way to determine if it might work is by using use the zdb -l command
> on each device in the pool and check for a populated devid= string. If
> the devid exists, then ZFS should be able to handle the device change.
> On a ctd device this syntax looks like this, for example:
>
> # zdb -l /dev/dsk/c1t1d0s0
>
> I would also recommend exporting the pool first, but I again I have no
> experience with this software.
>
> The whole topic of moving or changing devices under live pools,
> particularly on non-Sun gear, makes me queasy as does the fact that my
> teenage son will be driving soon so maybe my queasiness is related to
> my general fear of the unknown.
>
> Cindy
>
>
> On 12/08/09 10:15, Mike wrote:
>> I had a system that I was testing zfs on using EMC Luns to create a
>> striped zpool without using the multi-pathing software PowerPath.  Of
>> coarse a storage emergency came up so I lent this storage out for
>> temp storage and we're still using.  I'd like to add PowerPath to
>> take advanage of the multi-pathing in case I lose and SFP (or entire
>> switch for that matter) but I'm not exactly sure what I can do.
>>
>> So my zpool currently looks like:
>>
>> ######################################################
>> # zpool status -v
>>   pool: myzfs
>>  state: ONLINE
>>  scrub: none requested
>> config:
>>
>>         NAME        STATE     READ WRITE CKSUM
>>         myzfs       ONLINE       0     0     0
>>           1234567890    ONLINE       0     0     0
>>           1234567891    ONLINE       0     0     0
>> #######################################################
>>
>> So how would I change the path after I install PowerPath to use the
>> multi-path?  So 1234567890  would be equal to /dev/dsk/emcpower1 and
>> 1234567891 would be equal to /dev/dsk/emcpower2.
>>
>> In the end it would look like:
>>
>> ######################################################
>> # zpool status -v
>>   pool: myzfs
>>  state: ONLINE
>>  scrub: none requested
>> config:
>>
>>         NAME        STATE     READ WRITE CKSUM
>>         myzfs       ONLINE       0     0     0
>>           emcpower1  ONLINE       0     0     0
>>           emcpower1  ONLINE       0     0     0
>> #######################################################
>>
>> I would image (because I haven't tried it yet) that it would require
>> using zfs export/import in order to make this happen.  Has anyone
>> tried this?  Am I fubar?  Thanks for the help!  Great forum btw...
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