Subject: WARNING: 328.56ns period on non-DT device??
To: None <port-alpha@netbsd.org>
From: Paul Mather <paul@gromit.dlib.vt.edu>
List: port-alpha
Date: 10/11/2003 21:18:10
I just built and rebooted a new 1.6-CURRENT kernel on an AlphaServer
1000A.  Now, on probing the SCSI buses, some of the drives include
a line which says "WARNING: 328.56ns period on non-DT device."

What does this mean?

Before:

isp0 at pci1 dev 0 function 0: QLogic 1020 Fast Wide SCSI HBA
isp0: interrupting at dec_1000a irq 0
isp0: invalid NVRAM header
scsibus0 at isp0: 16 targets, 8 luns per target
[...]
sd2 at scsibus0 target 3 lun 0: <DEC, RZ29B    (C) DEC, 0016> disk fixed
sd2: async, 8-bit transfers
sd2: 4091 MB, 3708 cyl, 20 head, 113 sec, 512 bytes/sect x 8380080 sectors
sd2: sync (100.00ns offset 12), 16-bit (20.000MB/s) transfers, tagged queueing

After:

isp0 at pci1 dev 0 function 0: QLogic 1020 Fast Wide SCSI HBA
isp0: interrupting at dec_1000a irq 0
isp0: invalid NVRAM header
scsibus0 at isp0: 16 targets, 8 luns per target
[...]
sd2 at scsibus0 target 3 lun 0: <DEC, RZ29B    (C) DEC, 0016> disk fixed
sd2: async, 8-bit transfers
sd2: WARNING: 328.56ns period on non-DT device
sd2: 4091 MB, 3708 cyl, 20 head, 113 sec, 512 bytes/sect x 8380080 sectors
sd2: sync (100.00ns offset 12), 16-bit (20.000MB/s) transfers, tagged queueing

Aside from these extra warning messages, everything seems to work
normally, so I'm not worried so much as curious.

Cheers,

Paul.

e-mail: paul@gromit.dlib.vt.edu

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