| Title: | VAX on VMEbus: KAV30 |
| Notice: | Could have been as fast as 68K but its a VAX! |
| Moderator: | CSSVMS::KAV30_SUPP |
| Created: | Thu Apr 18 1991 |
| Last Modified: | Fri Aug 02 1996 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 159 |
| Total number of notes: | 645 |
I received the following from a customer:
We have a removable SCSI drive attached to a KAV30 in a product that we are
developing. The removable drive is used to supply data to the product.
Nevertheless, if there isn't a cartridge in the removable drive when the
product is turned on, the KAV30 never seems to acknowledge that the drive
exists. I understand that the KAV30 probably does not receive any SCSI packets
from the drive if the cartridge is not plugged in. Therefore, I have tried to
poll on the disk drive every 30 seconds by trying to open it with fopen.
Even if a cartridge is placed in the drive later, the KAV30 never seems to
acknowledge that it exists.
If the cartridge was plugged into the removable drive when the product
was turned on, even if the cartridge is removed later and accessed when
the drive is temporarily unavailable, this does not prevent the drive
from being accessed later when a cartridge is plugged in again.
It seems as if the SCSI driver for the KAV30 senses the drives that exist
upon power up and is not able to acknowledge a new drive after startup.
Is this basically true? Can I do something to cause the KAV30 processor to
acknowledge the removable drive if a cartridge was not plugged in upon
power up? Any assistance would be greatly appreciated!
I would appreciate any suggestions.
Thanks,
Sumithra
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 126.1 | not supported... | EICMFG::KAV30_SUPP | Fri May 20 1994 11:11 | 10 | |
Hi Sumithra,
the KAV30 SCSI port driver does not support removable media...
If your customer desperately needs it, we could offer to modify the
driver on a project basis.
best regards,
Thomas
| |||||
| 126.2 | ZYDECO::REDDY | Fri May 20 1994 16:20 | 3 | ||
Thanks, Thomas. I will check with the customer.
Sumithra
| |||||
| 126.3 | Check out the SCSI Sniffer program | SOLVIT::YAHUDI::CUSHNIE | Fri May 20 1994 22:38 | 17 | |
Hi Sumithra, If I remember correctly, the VAXELN SCSI Driver uses a SCSI 'Sniffer' program to determine what devices are on the SCSI bus. This 'Sniffer' is run at VAXELN initialisation by default, but there is no reason why it cannot why this program cannot be run again, once the system is initialised. With a bit of luck and imagination you should be able to reconfigure the SCSI bus periodically from your application. Hope this helps Regards John Cushnie@PCS | |||||