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FAQ-how to change CCS C01 MDS node array card into LSI1078 card

Publication Date:  2012-10-18 Views:  248 Downloads:  0

Issue Description

Upgrade CSS cloud storage to C01 edition, MDS node is T3200 server architecture, need to change SAS 1068 card into LSI 1078 card.

Alarm Information


Handling Process

1. Enter MDS SAS array card configuration interface, delete configuration
2. Power off MDS node, replace with LSI 1078 array card, be careful that do not connect SAS cable incorrectly
3. Power on MDS, reinstall operating system on MDS

Root Cause

As in CSS C00 edition, there is only one service MDS and no OSN service in MDS node. Metadata exist in 2 front disks of OSN1 and OSN2, MDS do not need space to store metadata, only need RAID1 system disk, so it use SAS array card; but in CSS C01 edition, there is both MDS service and OSN service in MDS node, they need to store all metadata, not only system disk but also several SSD disk, RAID5 is necessary, so it need LSI 1078 array card. 


It is recommended that change array card of CSS to LSI 1078 card when product leave factory