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Goat needed

SCSI peripheral devices Discussion of SCSI-based peripheral devices. (comp.periphs.scsi)


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  #11  
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David Lesher
 
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Default Re: Goat needed - 06-24-2009 , 04:06 PM






Michael Baeuerle <michael.baeuerle (AT) stz-e (DOT) de> writes:

Quote:
what means that the driver cannot autodetect external transceivers for
the SYM53C875 in all cases.
So it sounds as if all that knows is it may, or may not, be LVD.


Quote:
Looking at the tapes: There is one DDS3 and four DLT drives. The C1537A
is SE and the DLT2000 and DLT7000 are SE or HVD. The manuals say: None
of them was available with LVD interface.
The DDS3 is not used. It's internal.

The DLT2000's are part of VLS DLT's jukeboxes. One of the DLT7000's is
standalone. All SE.

The other changer is a Dell PowerVault 120T DLT7000 which is a rebadged
ADIC FastStor/ Quantum.


Quote:
Looks like your "LVD" labels are faked ... now you really should look
at the cards (for external transceivers between SYM53C875 and bus
connector) to be sure!
The Dell specs:

<http://support.dell.com/support/edocs/storage/adic7000/ug/specs.htm>

says:

SCSI-2 Fast/Wide, differential, 68-pin



--
A host is a host from coast to coast.................wb8foz (AT) nrk (DOT) com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

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  #12  
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Cydrome Leader
 
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Default Re: Goat needed - 06-24-2009 , 08:04 PM






David Lesher <wb8foz (AT) panix (DOT) com> wrote:
Quote:
Michael Baeuerle <michael.baeuerle (AT) stz-e (DOT) de> writes:

what means that the driver cannot autodetect external transceivers for
the SYM53C875 in all cases.

So it sounds as if all that knows is it may, or may not, be LVD.


Looking at the tapes: There is one DDS3 and four DLT drives. The C1537A
is SE and the DLT2000 and DLT7000 are SE or HVD. The manuals say: None
of them was available with LVD interface.

The DDS3 is not used. It's internal.

The DLT2000's are part of VLS DLT's jukeboxes. One of the DLT7000's is
standalone. All SE.

The other changer is a Dell PowerVault 120T DLT7000 which is a rebadged
ADIC FastStor/ Quantum.


Looks like your "LVD" labels are faked ... now you really should look
at the cards (for external transceivers between SYM53C875 and bus
connector) to be sure!

The Dell specs:

http://support.dell.com/support/edoc...0/ug/specs.htm

says:

SCSI-2 Fast/Wide, differential, 68-pin
That thing is 100% HVD.

I've used those autoloaders before. They came with their own SCSI card when purchased from
Dell.

Here are better docs from dell, they mention the adaptec 2944 card:

http://support.dell.com/support/edoc...0/ug/notes.htm

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  #13  
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David Lesher
 
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Default Re: Goat needed - 06-24-2009 , 11:18 PM



Cydrome Leader <presence (AT) MUNGEpanix (DOT) com> writes:

Quote:
SCSI-2 Fast/Wide, differential, 68-pin

That thing is 100% HVD.

I've used those autoloaders before. They came with their own SCSI card when purchased from
Dell.

Here are better docs from dell, they mention the adaptec 2944 card:

http://support.dell.com/support/edoc...0/ug/notes.htm

Ugh. So either I cooked the LVD drives or not; but that card won't
work. And I passed up a bunch of PCI SCSI cards at the last hamfest, and
now, I don't recall if any others I have are SE/LVD.






--
A host is a host from coast to coast.................wb8foz (AT) nrk (DOT) com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

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  #14  
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Cydrome Leader
 
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Default Re: Goat needed - 06-26-2009 , 04:02 PM



David Lesher <wb8foz (AT) panix (DOT) com> wrote:
Quote:
Cydrome Leader <presence (AT) MUNGEpanix (DOT) com> writes:

SCSI-2 Fast/Wide, differential, 68-pin

That thing is 100% HVD.

I've used those autoloaders before. They came with their own SCSI card when purchased from
Dell.

Here are better docs from dell, they mention the adaptec 2944 card:

http://support.dell.com/support/edoc...0/ug/notes.htm


Ugh. So either I cooked the LVD drives or not; but that card won't
the drives are probably OK- I'm not aware of any SCSI bus mixups that
actually broke a drive.

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  #15  
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Jeff Jonas
 
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Default Re: Goat needed - 06-29-2009 , 11:31 PM



Quote:
Enterprise Sparc 250; I don't know the Adaptec adapter model but it
reports back as:
$ cat /proc/scsi/sym53c8xx/2
Chip sym53c875, device id 0xf, revision id 0x14
On PCI bus 0, device 4, function 0, IRQ 4,7d8
Min. period factor 12, Wide SCSI BUS
Max. started commands 1022, max. commands per LUN 64

Looks like you run Linux instead of Solaris and that your HA is from LSI
(aka Symbios Logic) not Adaptec.
The 53cxx chips were originally by NCR, then Symbios, then LSI,
so all names may historically apply for the drivers, device names,
man pages & documentation.

And "device id 0xf": is that the PCI ID or SCSI ID?
(both PCI and SCSI parameters are reported there).
The SCSI BUS id for the HA is usually 7,
even for wide, for compatibility with narrow devices.

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  #16  
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David Lesher
 
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Default LVD only? - 08-04-2009 , 02:11 AM



I'm still trying to scrape up a LVD card to talk to those Compaq
drives....

So now I'm wondering... Are any SCSI devices really LVD only?

I found a paper on the SCSI Trade Assoc site
<28b7h6-sf2.ln1 (AT) micha (DOT) freeshell.org> and it seemed to imply that LVD was
a superset of SE; if any device on a LVD chain pulled a h DIFFSENS low,
all devices on the chain would follow along to the land of SE.

If so, I can tolerate the lower speed of SE & stop looking for a LVD card.
--
A host is a host from coast to coast.................wb8foz (AT) nrk (DOT) com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

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  #17  
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David Lesher
 
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Default Re: LVD only? - 08-04-2009 , 11:33 AM



Quote:
I found a paper on the SCSI Trade Assoc site
28b7h6-sf2.ln1 (AT) micha (DOT) freeshell.org> and it seemed to imply that LVD was
Bad cut and paste THERE...
try:
<http://www.scsita.org/aboutscsi/SCSI_Termination_Tutorial.html>
--
A host is a host from coast to coast.................wb8foz (AT) nrk (DOT) com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

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