Grass Valley K2 Summit Storage Area Network Installation - Manual (Page 253)

K2 client media (iSCSI) connection failover behavior
If the following system connection or component fails to respond to network communication:
• Media (iSCSI) network “A” connection between a K2 client and the GigE switch
Then the following failover behavior occurs:
1. The K2 client drops communication on its “A” media port and begins using its “B” media port
and the “B” media (iSCSI) network. The iSCSI adapter (TOE) on the “B” K2 Media Server
provides access to the Fibre Channel connected RAID storage.
2. Control traffic keeps using the same path to K2 Media Server “A”.
3. K2 Media Server “A” is still the media file system/metadata server. The media file system (SNFS)
and media database do not fail over.
4. The other K2 clients (not affected by the component failure) keep using the same paths for media
and control, as in pre-failover behavior. This means the K2 clients unaffected by the failover are
using the iSCSI adapter (TOE) on the “A” K2 Media Server to provide access to the Fibre Channel
connected RAID storage, while at the same time the affected K2 clients are using the iSCSI
adapter (TOE) on the “B” K2 Media Server to provide access to the Fibre Channel connected
RAID storage. In this case both RAID controller are simultaneously providing disk access.
18 November 2010 K2 SAN Installation and Service Manual 253
Operating the K2 SAN