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zhangduolong
59 Posts
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June 26th, 2015 00:00
Server with raid card
Hello experts
when configure server that has raid card as SDS,which the following is recommended to configure the disks?
Option 1: Configure all the disks as one raid5(or raid10 )volume,then create some logical lun
Option 2: Configure each disk as raid0 volume
DanAharoni
16 Posts
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Posted June 26th, 2015 07:00
This is exactly right, use R0 for the drives, WT (Write Through) for the SSD storage pool drives and WB (Write Back) for HDD if you have a DRAM protected Raid controller.
keep in mind you also need OS drives. usually you want to have these drives mirrored with Raid-1.
Carl-Adam_Lilje
32 Posts
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Posted June 26th, 2015 01:00
You should create every disk as a separate R0 and let ScaleIO handle failures.
Configure SSD's as write-through (no cache) and depending on if you have battery backed cache you can decide if you configure write caching or not for rotating disks.
Carl-Adam Liljeholm
Sr. Speciality SE
EMC Software Defined Solutions