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Question regarding storage expansion on a DL380 G5 with SA-P400 array

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Question regarding storage expansion on a DL380 G5 with SA-P400 array

I am taking over management of a G5 DL380 with a SmartArray P400 card.  The system currently has:

4 x 72 GB 10k rpm drives (model DG072A8B54) configured as array 1

4 x 146 GB 10k rpm drives (model EG0146FAWHU) configured as array 2.


Both arrays are configured as single logical drives and in Windows the drives are configured as dynamic drives with  Drive 0 partitioned into a small boot partition and a larger data partition; Drive 1


The SA-P400 does have a battery backed cache that the ACU reports is "OK".


I know this unit supports array expansion if not all drives bays have been used in an array.  Is it possible to expand the array by replacing the 146 GB drives with larger (e.g.. 300 GB)?


Can I replace the 4 drives in the second array without touching the first array?


How does one locate part numbers for 300 GB (or greater) SFF SAS drives for a G5 server?  At first glance Ingram seems to only stock drives for G6 and newer DL380s.


Many thanks in advance