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authorLinus Torvalds <torvalds@linux-foundation.org>2008-08-08 05:13:30 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-08 05:13:30 +0400
commit8e43e12d638f732fa32600c324711f4be8fe0b1d (patch)
treea0e545bebea11b3ce08147d2e36f2acb1a13de1d /Documentation
parent01b09b6c605ed119fba75b82582f017e44dd4a55 (diff)
parent62aa0054da220b8bbe6f23c0eb1d97a99005d0b3 (diff)
downloadlinux-8e43e12d638f732fa32600c324711f4be8fe0b1d.tar.xz
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: xen-blkfront.c: make blkif_ioctl() static bio: make use of bvec_nr_vecs cciss: fix bug if scsi tape support is disabled cciss: add support for multi lun tape devices cciss: change the way we notify scsi midlayer of tape drives cciss: fix negative logical drive count in procfs cciss: remove redundant code cciss: make rebuild_lun_table behave better cciss: return -EFAULT if copy_from_user() fails
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/cciss.txt21
1 files changed, 6 insertions, 15 deletions
diff --git a/Documentation/cciss.txt b/Documentation/cciss.txt
index 63e59b8847c5..8244c6442faa 100644
--- a/Documentation/cciss.txt
+++ b/Documentation/cciss.txt
@@ -112,27 +112,18 @@ Hot plug support for SCSI tape drives
Hot plugging of SCSI tape drives is supported, with some caveats.
The cciss driver must be informed that changes to the SCSI bus
-have been made, in addition to and prior to informing the SCSI
-mid layer. This may be done via the /proc filesystem. For example:
+have been made. This may be done via the /proc filesystem.
+For example:
echo "rescan" > /proc/scsi/cciss0/1
-This causes the adapter to query the adapter about changes to the
-physical SCSI buses and/or fibre channel arbitrated loop and the
+This causes the driver to query the adapter about changes to the
+physical SCSI buses and/or fibre channel arbitrated loop and the
driver to make note of any new or removed sequential access devices
or medium changers. The driver will output messages indicating what
devices have been added or removed and the controller, bus, target and
-lun used to address the device. Once this is done, the SCSI mid layer
-can be informed of changes to the virtual SCSI bus which the driver
-presents to it in the usual way. For example:
-
- echo scsi add-single-device 3 2 1 0 > /proc/scsi/scsi
-
-to add a device on controller 3, bus 2, target 1, lun 0. Note that
-the driver makes an effort to preserve the devices positions
-in the virtual SCSI bus, so if you are only moving tape drives
-around on the same adapter and not adding or removing tape drives
-from the adapter, informing the SCSI mid layer may not be necessary.
+lun used to address the device. It then notifies the SCSI mid layer
+of these changes.
Note that the naming convention of the /proc filesystem entries
contains a number in addition to the driver name. (E.g. "cciss0"