Mohanad Awad wrote:If it is not a local device, what storage is used? What is the I/O fabric layer? Fibre channel (FC)? Infiniband? FCoE? Scsi over Ethernet? Something else?No. But devices /dev/sdb and /dev/sdc seems like local devices? And you showed above these as partitions and partitions used as ASM disks?No it's not local device , it's come from storge , and my disk group contain just from one disk memeber ! from storge defination the group created from tow physical hard disk device ,
Mohanad Awad wrote:The rawdevices approach was used to perform direct I/O on block devices, via a character device I/O interface, as block devices did not support direct I/O.
all my issue is on raw device how to use not more !