Messages in this thread | | | Date | Sun, 10 Jan 1999 17:26:07 -0600 (CST) | From | "Andre M. Hedrick" <> | Subject | Re: ide-tape/ide-card broken in 2.2pre3 and greater |
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Follow-up::
The drive that failed resulted in a file_mark_error, but the larger drive has been successfull with repeatable backups. After checking the media back in dos, there was a bad-block. An attempted re-format with CBD 4.X on the Colorado 5GB failed and wiped the media to unusable.
Second note:
#if 0 drive->dsc_overlap = 1; #else drive->dsc_overlap = (drive->id->capability & 0x20) ? 1 : 0; #endif
We have discussed this issue in the past. The test maybe wrong, but the result is success; therefore, since dsc_overlap does not appear to behave nicely (based on imperical tests).
Would 'drive->dsc_overlap = 0;' seem practable? I still have not read all of the referrence material you have suggested.
Other test observed that I can not setup xfer_rates at init time on a new chipset that is non-bootable. I get a status value of 0x01 when using Dave Millers set_xfer stripped from cmd646.c with 'drive->dsc_overlap = 1;' and the system (SMP) hangs hard; however, with it set to 0, I have full success in tuning the tape drive. We get a series of stat values 0xd0 then 0x50 between programming commands.
I know that what DM has written works nicely, since I can enable DMA mode 2 via chipset tuning on both tape drives, the driver does acknowledge the fact, and hdparm does correctly report the dma modes.
On Sat, 9 Jan 1999, Andre M. Hedrick wrote:
> Gadi, > > I looked at what you did with ide-floppy and repeated with > > /* > * Some tape drives require a long irq timeout > */ > #if 0 > #define IDETAPE_WAIT_CMD 60 > #else > #define IDETAPE_WAIT_CMD (5 * WAIT_CMD) > #endif > > > and I have two tapes under SMP streaming, opps, maybe one now. > > What is the preferred wait timeout?
Cheers, Andre Hedrick The (NEW) Linux IDE guy The APC UPS Specialist for Linux
http://www.dyer.vanderbilt.edu/server/udma/ http://www.dyer.vanderbilt.edu/server/apcupsd/apcupsd-3.5.2.bin.tar.gz
You just need a bigger hammer, or learn how to swing the one you have better. (C) me.....
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