>-----Original Message-----
>Hi,
>
>MSA1000 supports ADG RAID that allows at most 2 physical
>disks failed without loss of data. ADG array is formed by
>at least 4 disks, which offers available sizes of 2
disks,
>with 5 has 3, with 6 has 4, and so on.
>
>In my company, all logical drives for SQL data, quorum
and
>MSDTC are created on ADG RAID drives for optimal
>redundancy.
>
>In contrast, for log files, use 0+1 RAID type for higher
>rate of write I/O. (MSA1000 can create 0+1 array with 2
>physical disks)
>
>Both 0+1 drive and ADG drive are created on seperate
array.
>In my case, 4 drives forms ADG while 2 drives forms 0+1.
>
>Finally, my system have 2 clustered SQL servers sharing
>the same MSA1000. Always create arrays specific to the
>services. This could prevent degrade of performance on
>both services, especially signficant to collect
>information of performance log. In your case, don't put
>files of SQL server and Exchange on the same arrays.
>
>My final conclusion, you should create 2 arrays: One
>always creating ADG drives, for quorum, MSDTC, SQL server
>data, tempdb and SQL & Exchange install. One creating 0+1
>drive for SQL server transaction log and exchange log
>
>Hope this help. ^^
>
>
>>-----Original Message-----
>>Here are the possible shared logical drive requirements
>that I'm aware of:
>>* Cluster Quorum
>>* MS-DTC
>>* SQL T-Log(s)
>>* SQL TempDB
>>* SQL Data drive(s)
>>* Exchange log
>>* Exchange data
>>
>>Option A
>>2x36GB 15K RAID 1 (A/B buses) - 1 LUN - Quorum
>>6x36GB 15K RAID 0+1 (A/B buses) - 4 LUNs - MS-DTC,
>Exchange logs, SQL logs,
>>TempDB
>>2x36GB 15K online hot spares (one each A/B buses)
>>
>>12x146GB 10K RAID 0+1 (C/D buses) - at least 3 LUNs
>(Exchange data, SQL
>>data, TDB data)
>>2x146GB 10K online hot spares (one each C/D buses)
>>
>>SQL performance and scalability is primary concern.
>Please advise if this
>>configuration is optimum. If not, any recommendations?
>>
>>Thanks in advance! - rg
>>
>>.
>>
>.