SATA diszkkel nem fog menni, nem tudja az SCSI rezervációt.
De nincs veszve minden:
The Sun Cluster 3.2 update 2 release that will ship in early 2009 contains
a new feature called "Software Quorum". We are aware that there are storage
devices, such as SATA and SSD, that do not support SCSI-2 and also do not
support SCSI-3 reservation related operations. "Software Quorum" emulates
entirely in software the SCSI-3 Persistent Group Reservations. All storage devices
supported by a Solaris disk driver have a small area reserved for cluster use.
Thus we can do persistent emulation. This gives Sun Cluster the ability
to support any shared disk (or shared storage that acts like a disk).
Sun Cluster provides two main features to support shared storage.
1) The shared storage device can be a quorum device. "Software Quorum"
protocol enables any shared disk to be a quorum device.
2) Sun Cluster provides fencing. SCSI-3 provides strong fencing.
SCSI-2 provides a less robust form of fencing. SCSI-2 has several features.
An important feature is that there is a thread that probes the device
periodically, and panics the node if the probe fails.
The probe fails when the node has been fenced from the device.
With "Software Quorum"
we have a similar thread that also probes the device and panics the
node if the probe fails. This provides a similar form of data integrity.
We have successfully tested "software quorum" with Sun Cluster and SATA
disks. We have a group that qualifies various storage products, so
you would have to check with them about which storage products have
been qualified and about requests to do so.