[lkml]   [2001]   [Jun]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subjectmulti-path IO in SCSI mid-layer
Hi -

I'm interested in multi-path IO in the linux scsi mid-layer.

Are there developers working on changes to the scsi layers/interfaces?
I've seen references about such work, but no details.

Anyone else interested in or working on multi-path IO in the mid-layer?

I've looked at the code as to what changes might be required, and did
a simple prototype to issue IO requests using multiple paths for one device -
configuring one device in with multiple paths using SCSI INQUIRY page 0x83,
and selecting a path (just round-robin) at scsi_submit_cmd() time.

But, a decent multi-path IO implementation requires significant changes
to the current linux scsi interfaces/structures - especially where no
functional interfaces exist, such as the direct references to Scsi_Device
host, and Scsi_Host host_queue.

Patrick Mansfield
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 12:55    [W:0.031 / U:1.864 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site