Re: [Bacula-users] LTO via USB

[Josh Fisher via Bacula-users]

I don't think it can be done by USB. The SAS-to-USB chips operate in 
"mass storage" mode, suitable for SAS hard drives. The LTO drive will 
need an adapter that operates in SCSI emulation mode. I don't know of 
any adapters that aren't strictly for hard drives, but maybe there are.


Another approach is to use a Thunderbolt port instead. Thunderbolt is 
essentially an encapsulation of PCI-e. There are many Thunderbolt PCI-e 
Expansion chassis available that are simply one or more PCI-e slots 
connected via Thunderbolt (but with their own power supply). You can 
insert a PCI-e SAS controller in the expansion chassis and the server 
will treat it exactly like one of its own PCI-e slots, so the OS will 
see the tape drive in exactly the same way and so then would Bacula.



On 8/22/22 11:29, Jose Alberto wrote:

USB if supported by Bacula.

I have worked for lab and training with DDS3 USB drives.

you detect them the same as scsi (lsscsi -g) Of course here you don't 
see the "mediumx" you only see the TAPE , you don't declare 
autochanger, only the devices


width= 
 
	Libre de virus.www.avast.com 
 




On Thu, Aug 18, 2022 at 8:44 AM Adam Weremczuk 
 wrote:


Hi all,

This might be considered slightly off topic but has anybody tried
installing USB3 PCIe card in an external LTO tape drive?

Many models appear to have 2 slots with only one occupied by SAS by
default, e.g:

https://www.bechtle.com/de-en/shop/quantum-lto-7-hh-sas-external-drive--4038311--p

The idea would be for the tape drive to operate via SAS 99% of the
time
but occasionally move it elsewhere and easily access via USB (from
any
desktop or laptop).

Somebody has done it before on a factory level:

https://www.fujifilm.com/in/en/business/data-management/datastorage/lto-tape-drive/brochure
but I would prefer not to be limited and locked to this one
particular
model + software.

I'm assuming that I should still be able to run Bacula with the above?

Any advise?

Regards,
Adam



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Re: [Bacula-users] LTO via USB

[Wolfgang Denk]

Dear Adam,

In message  you wrote:
>
> This might be considered slightly off topic but has anybody tried 
> installing USB3 PCIe card in an external LTO tape drive?
>
> Many models appear to have 2 slots with only one occupied by SAS by 
> default, e.g:
> https://www.bechtle.com/de-en/shop/quantum-lto-7-hh-sas-external-drive--4038311--p

Did you ever take a look at a LTO drive and inside an external case?

Those cases may appear to have "slots", but I have never seen a case
where an external case / drive actually used a PCIe card or such:
the SAS interface is builtin to the drive itself, and there is
usually only a cable adapter to match to the external connectors of
the case.

There are no PCIe or any other slots there, and there is no
processor to drive any such cards.

> The idea would be for the tape drive to operate via SAS 99% of the time 
> but occasionally move it elsewhere and easily access via USB (from any 
> desktop or laptop).
>
> Somebody has done it before on a factory level:
> https://www.fujifilm.com/in/en/business/data-management/datastorage/lto-tape-drive/brochure
> but I would prefer not to be limited and locked to this one particular 
> model + software.

Apparently this is indeed a custom solution adding a USB3 interface
- probably as some kind of adapter between the drive (and I bet that
the drive itself has only a native SAS interface), similar to the
adapters you find in many HDD enclosures converting SATA to USB.
And this is certainly not a PCIe card either.

> I'm assuming that I should still be able to run Bacula with the above?

I would think so, too.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,  Managing Director: Wolfgang Denk
HRB 165235 Munich,  Office: Kirchenstr. 5, 82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
"There are three principal ways to lose money: wine, women,  and  en-
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the more certain."  -- Baron Rothschild, ca. 1800


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Re: [Bacula-users] LTO via USB

[Jose Alberto]

USB if supported by Bacula.

I have worked for lab and training with DDS3 USB drives.

you detect them the same as scsi (lsscsi -g) Of course here you don't see
the "mediumx" you only see the TAPE , you don't declare autochanger, only
the devices

[image: width=]

Libre
de virus.www.avast.com

<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

On Thu, Aug 18, 2022 at 8:44 AM Adam Weremczuk 
wrote:

> Hi all,
>
> This might be considered slightly off topic but has anybody tried
> installing USB3 PCIe card in an external LTO tape drive?
>
> Many models appear to have 2 slots with only one occupied by SAS by
> default, e.g:
>
> https://www.bechtle.com/de-en/shop/quantum-lto-7-hh-sas-external-drive--4038311--p
>
> The idea would be for the tape drive to operate via SAS 99% of the time
> but occasionally move it elsewhere and easily access via USB (from any
> desktop or laptop).
>
> Somebody has done it before on a factory level:
>
> https://www.fujifilm.com/in/en/business/data-management/datastorage/lto-tape-drive/brochure
> but I would prefer not to be limited and locked to this one particular
> model + software.
>
> I'm assuming that I should still be able to run Bacula with the above?
>
> Any advise?
>
> Regards,
> Adam
>
>
>
> ___
> Bacula-users mailing list
> Bacula-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bacula-users
>


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