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drbd-user: [DRBD-user] Can someone help me configure SCST?

[DRBD-user] Can someone help me configure SCST?

From: dbarker <dbarker_at_nospam>
Date: Tue Mar 23 2010 - 22:47:47 GMT
To: drbd-user@lists.linbit.com

I have a totally trivial setup trying to make iscsi-scst work with drbd. I'm
having trouble finding documentation on the options for the scst system, but
someone has it working!

If I change my scst config to use /dev/sdb, scst loads it fine. iscsi-scst
creates a target and ESXi can format and use it. If I change my config to
use /dev/drbd0, scst won't load it. dmesg says:

 scst: SCST version 1.0.1.1 loaded successfully (max mem for commands 126MB,
per device 50MB)
 scst: Enabled features: Strict serializing, TRACING
 scst: Device handler "dev_disk" for type 0 registered successfully
 scst: Device handler "dev_disk_perf" for type 0 registered successfully
 scst: Virtual device handler vdisk for type 0 registered successfully
 scst: Virtual device handler vdisk_blk for type 0 registered successfully
 scst: Virtual device handler vdisk_null for type 0 registered successfully
 scst: Virtual device handler vcdrom for type 5 registered successfully
 dev_vdisk: Registering virtual BLOCKIO device disk01 (BLOCKIO)
 dev_vdisk: ***ERROR*** filp_open(/dev/drbd0) returned error -2
 scst: ***ERROR*** New device handler's vdisk_blk attach() failed: -2
 scst: Failed to attach SCSI target mid-level to virtual device disk01

scst.conf works, but isn't drbd:

[HANDLER vdisk]
DEVICE disk01,/dev/sdb,BLOCKIO,512
[ASSIGNMENT Default]
DEVICE disk01,0

scst.conf falis as above:

[HANDLER vdisk]
DEVICE disk01,/dev/drbd0,BLOCKIO,512
[ASSIGNMENT Default]
DEVICE disk01,0

drbd.conf:
 r0 {
  device /dev/drbd1;
  disk /dev/sdb;
  meta-disk internal;
  on Scst0 ...

tia

Dan

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