diff options
Diffstat (limited to 'Documentation/scsi/ibmmca.txt')
-rw-r--r-- | Documentation/scsi/ibmmca.txt | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/Documentation/scsi/ibmmca.txt b/Documentation/scsi/ibmmca.txt index 9b9516364ec1..35f6b8ed2295 100644 --- a/Documentation/scsi/ibmmca.txt +++ b/Documentation/scsi/ibmmca.txt | |||
@@ -309,9 +309,9 @@ | |||
309 | 2.6 Abort & Reset Commands | 309 | 2.6 Abort & Reset Commands |
310 | -------------------------- | 310 | -------------------------- |
311 | These are implemented with busy waiting for interrupt to arrive. | 311 | These are implemented with busy waiting for interrupt to arrive. |
312 | ibmmca_reset() and ibmmca_abort() do not work sufficently well | 312 | ibmmca_reset() and ibmmca_abort() do not work sufficiently well |
313 | up to now and need still a lot of development work. But, this seems | 313 | up to now and need still a lot of development work. This seems |
314 | to be even a problem with other SCSI-low level drivers, too. However, | 314 | to be a problem with other low-level SCSI drivers too, however |
315 | this should be no excuse. | 315 | this should be no excuse. |
316 | 316 | ||
317 | 2.7 Disk Geometry | 317 | 2.7 Disk Geometry |
@@ -684,8 +684,8 @@ | |||
684 | not like sending commands to non-existing SCSI-devices and will react | 684 | not like sending commands to non-existing SCSI-devices and will react |
685 | with a command error as a sign of protest. While this error is not | 685 | with a command error as a sign of protest. While this error is not |
686 | present on IBM SCSI Adapter w/cache, it appears on IBM Integrated SCSI | 686 | present on IBM SCSI Adapter w/cache, it appears on IBM Integrated SCSI |
687 | Adapters. Therefore, I implemented a workarround to forgive those | 687 | Adapters. Therefore, I implemented a workaround to forgive those |
688 | adapters their protests, but it is marked up in the statisctis, so | 688 | adapters their protests, but it is marked up in the statistics, so |
689 | after a successful boot, you can see in /proc/scsi/ibmmca/<host_number> | 689 | after a successful boot, you can see in /proc/scsi/ibmmca/<host_number> |
690 | how often the command errors have been forgiven to the SCSI-subsystem. | 690 | how often the command errors have been forgiven to the SCSI-subsystem. |
691 | If the number is bigger than 0, you have a SCSI subsystem of older | 691 | If the number is bigger than 0, you have a SCSI subsystem of older |
@@ -778,15 +778,15 @@ | |||
778 | not accept this, as they stick quite near to ANSI-SCSI and report | 778 | not accept this, as they stick quite near to ANSI-SCSI and report |
779 | a COMMAND_ERROR message which causes the driver to panic. The main | 779 | a COMMAND_ERROR message which causes the driver to panic. The main |
780 | problem was located around the INQUIRY command. Now, for all the | 780 | problem was located around the INQUIRY command. Now, for all the |
781 | mentioned commands, the buffersize, sent to the adapter is at | 781 | mentioned commands, the buffersize sent to the adapter is at |
782 | maximum 255 which seems to be a quite reasonable solution. | 782 | maximum 255 which seems to be a quite reasonable solution. |
783 | TEST_UNIT_READY gets a buffersize of 0 to make sure, that no | 783 | TEST_UNIT_READY gets a buffersize of 0 to make sure that no |
784 | data is transferred in order to avoid any possible command failure. | 784 | data is transferred in order to avoid any possible command failure. |
785 | 2) On unsuccessful TEST_UNIT_READY, the midlevel-driver has to send | 785 | 2) On unsuccessful TEST_UNIT_READY, the mid-level driver has to send |
786 | a REQUEST_SENSE in order to see, where the problem is located. This | 786 | a REQUEST_SENSE in order to see where the problem is located. This |
787 | REQUEST_SENSE may have various length in its answer-buffer. IBM | 787 | REQUEST_SENSE may have various length in its answer-buffer. IBM |
788 | SCSI-subsystems report a command failure, if the returned buffersize | 788 | SCSI-subsystems report a command failure if the returned buffersize |
789 | is different from the sent buffersize, but this can be supressed by | 789 | is different from the sent buffersize, but this can be suppressed by |
790 | a special bit, which is now done and problems seem to be solved. | 790 | a special bit, which is now done and problems seem to be solved. |
791 | 2) Code adaption to all kernel-releases. Now, the 3.2 code compiles on | 791 | 2) Code adaption to all kernel-releases. Now, the 3.2 code compiles on |
792 | 2.0.x, 2.1.x, 2.2.x and 2.3.x kernel releases without any code-changes. | 792 | 2.0.x, 2.1.x, 2.2.x and 2.3.x kernel releases without any code-changes. |
@@ -1156,7 +1156,7 @@ | |||
1156 | Guide) what has to be done for reset, we still share the bad shape of | 1156 | Guide) what has to be done for reset, we still share the bad shape of |
1157 | the reset functions with all other low level SCSI-drivers. | 1157 | the reset functions with all other low level SCSI-drivers. |
1158 | Astonishingly, reset works in most cases quite ok, but the harddisks | 1158 | Astonishingly, reset works in most cases quite ok, but the harddisks |
1159 | won't run in synchonous mode anymore after a reset, until you reboot. | 1159 | won't run in synchronous mode anymore after a reset, until you reboot. |
1160 | Q: Why does my XXX w/Cache adapter not use read-prefetch? | 1160 | Q: Why does my XXX w/Cache adapter not use read-prefetch? |
1161 | A: Ok, that is not completely possible. If a cache is present, the | 1161 | A: Ok, that is not completely possible. If a cache is present, the |
1162 | adapter tries to use it internally. Explicitly, one can use the cache | 1162 | adapter tries to use it internally. Explicitly, one can use the cache |