diff options
Diffstat (limited to 'Documentation/cciss.txt')
-rw-r--r-- | Documentation/cciss.txt | 21 |
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 | |||
112 | 112 | ||
113 | Hot plugging of SCSI tape drives is supported, with some caveats. | 113 | Hot plugging of SCSI tape drives is supported, with some caveats. |
114 | The cciss driver must be informed that changes to the SCSI bus | 114 | The cciss driver must be informed that changes to the SCSI bus |
115 | have been made, in addition to and prior to informing the SCSI | 115 | have been made. This may be done via the /proc filesystem. |
116 | mid layer. This may be done via the /proc filesystem. For example: | 116 | For example: |
117 | 117 | ||
118 | echo "rescan" > /proc/scsi/cciss0/1 | 118 | echo "rescan" > /proc/scsi/cciss0/1 |
119 | 119 | ||
120 | This causes the adapter to query the adapter about changes to the | 120 | This causes the driver to query the adapter about changes to the |
121 | physical SCSI buses and/or fibre channel arbitrated loop and the | 121 | physical SCSI buses and/or fibre channel arbitrated loop and the |
122 | driver to make note of any new or removed sequential access devices | 122 | driver to make note of any new or removed sequential access devices |
123 | or medium changers. The driver will output messages indicating what | 123 | or medium changers. The driver will output messages indicating what |
124 | devices have been added or removed and the controller, bus, target and | 124 | devices have been added or removed and the controller, bus, target and |
125 | lun used to address the device. Once this is done, the SCSI mid layer | 125 | lun used to address the device. It then notifies the SCSI mid layer |
126 | can be informed of changes to the virtual SCSI bus which the driver | 126 | of these changes. |
127 | presents to it in the usual way. For example: | ||
128 | |||
129 | echo scsi add-single-device 3 2 1 0 > /proc/scsi/scsi | ||
130 | |||
131 | to add a device on controller 3, bus 2, target 1, lun 0. Note that | ||
132 | the driver makes an effort to preserve the devices positions | ||
133 | in the virtual SCSI bus, so if you are only moving tape drives | ||
134 | around on the same adapter and not adding or removing tape drives | ||
135 | from the adapter, informing the SCSI mid layer may not be necessary. | ||
136 | 127 | ||
137 | Note that the naming convention of the /proc filesystem entries | 128 | Note that the naming convention of the /proc filesystem entries |
138 | contains a number in addition to the driver name. (E.g. "cciss0" | 129 | contains a number in addition to the driver name. (E.g. "cciss0" |