Re: EMC SAN


1 - Stop all i/o to the array
2 - Turn off power to each SPS
3 - Turn off power to each DAE
Make sure you're not pulling the power for the SP itself in step 2. Be
ultra-certain it's the SPS, otherwise you risk losing data in cache.

as noted by others, clariions do not provide software shutdown. you
need to turn off power to the standby power supplies.
how to locate sps -> the sps have a black rocker switch on them. power
cable from rack goes in the sps and one power cable from sps goes to
the storage processors. on higher models (600/700) second power cable
goes to first drive enclosure. in prev models its unused.

to make sure all the io has stopped, its advisable to shut down all the
connected hosts..after that turn off both sps by moving the rocker
switches. this will start the array to flush the cache data and then
shutdown automatically.
once the lights on sps go off, its safe to turn off power to drive
enclosures too.


Yes, the Clariion will destage any data in cache out to disk and if
your servers are off, there won't be any write data there. You're
relying on the Clariion detecting the UPS status in order to shut
itself down cleanly.

this is *ideal* assumption...i have seen unhappy customers after power
outage. its better to shut down the array than leave it as it is...if
you cant do it (if you are managing array remotely) atleast disable the
write/cache on array and remember to turn it on once the power is back
to normal (which most forget and call in for performance slowdown).

.

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