* Scsi tape write protect status question
@ 2009-07-14 21:03 Mark Hounschell
2009-07-14 21:23 ` Mark Hounschell
0 siblings, 1 reply; 3+ messages in thread
From: Mark Hounschell @ 2009-07-14 21:03 UTC (permalink / raw)
To: linux-scsi; +Cc: Mark Hounschell
Sorry to bother you all with such an easy thing. I can't figure out how the
kernel knows I have a write protected tape in a drive that I open via
open("/dev/st0", O_RDWR, cf_flg, 0666)
Using the sgio interface I can only sense a write protect status after
attempting to to a write.
How can one know this before doing a write op?
Thanks in advance
Mark
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Scsi tape write protect status question
2009-07-14 21:03 Scsi tape write protect status question Mark Hounschell
@ 2009-07-14 21:23 ` Mark Hounschell
2009-07-15 10:52 ` Mark Hounschell
0 siblings, 1 reply; 3+ messages in thread
From: Mark Hounschell @ 2009-07-14 21:23 UTC (permalink / raw)
To: markh; +Cc: linux-scsi, Mark Hounschell
Mark Hounschell wrote:
> Sorry to bother you all with such an easy thing. I can't figure out how
> the
> kernel knows I have a write protected tape in a drive that I open via
>
> open("/dev/st0", O_RDWR, cf_flg, 0666)
Sorry for the typo
open("/dev/st0", O_RDWR, 0666)
>
> Using the sgio interface I can only sense a write protect status after
> attempting to to a write.
> How can one know this before doing a write op?
>
> Thanks in advance
> Mark
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Scsi tape write protect status question
2009-07-14 21:23 ` Mark Hounschell
@ 2009-07-15 10:52 ` Mark Hounschell
0 siblings, 0 replies; 3+ messages in thread
From: Mark Hounschell @ 2009-07-15 10:52 UTC (permalink / raw)
To: markh; +Cc: linux-scsi
Mark Hounschell wrote:
> Mark Hounschell wrote:
>> Sorry to bother you all with such an easy thing. I can't figure out how
>> the
>> kernel knows I have a write protected tape in a drive that I open via
>>
>> open("/dev/st0", O_RDWR, cf_flg, 0666)
>
> Sorry for the typo
>
> open("/dev/st0", O_RDWR, 0666)
>
>> Using the sgio interface I can only sense a write protect status after
>> attempting to to a write.
>> How can one know this before doing a write op?
>>
Never mind, it's in the mode-sense data.
Mark
^ permalink raw reply [flat|nested] 3+ messages in thread
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