0

I have a NAS System at home with a RAID-6 and somewhere around 20TB of data.

I have bought a LTO4 external drive that connects over SAS and a few tapes for testing.

A few questions:

  • Do you have any ideas on how to connect the RaspberryPi to a SAS (tape) drive ?
  • Is there any (opensource) software that could work to automate the backup of my NAS with the Raspi?
  • If the Raspi is not the ideal choice, what could be the smallest computer that could handle SAS Drives?
  • 2
    I think you are going to struggle. Even a cheap, common SAS card for a regular PC or Server is above your budget and those are the common use-cases - hence 'cheap' options. If you are on a budget i'd suggest you look for a second-hand server with an onboard SAS controller and use that. SAS is not a particularly consumer-orientated interconnect (like SATA or USB). – tobyd Jan 24 '18 at 12:05
  • I have a PCI second hand SAS card. However maybe there is a way to connect a PCI card to a very small form-factor computer without any PCI controler and slot – Jonathan DEKHTIAR Jan 24 '18 at 12:23
  • Such a contraption may exist that provides you a PCI (likely PCI-e ) interface over USB but performance would be horrible. I think you are looking at the wrong device for whats typically an enterprise, not hobbyist solution. – tobyd Jan 24 '18 at 13:21
  • @JonathanDEKHTIAR can you elaborate on the type of nas system you have? – Mohammad Ali Jan 28 '18 at 20:00
0

I would suggest buying a low-power PC in a mini-tower. Just enough of a machine to fit your PCI board in. Anything I have seen has cost more than such a PC.

You can even probably get it used to spend less money, but even a low-end PC will cost under $1,000.

Nothing I've searched for will connect a USB port to a SAS device.

If you really wanted to do this, you'd have to do a lot of work. I'd start by looking up the PCI bus' electrical specs so that you could connect to it. Then you'd need a power supply to power the tape drive and probably the PCI board.

Then the real work begins: you'd need to write a custom driver.

Just get the PC if there is a driver available. Otherwise you have an interesting-looking paperweight, unless you are very good at electronics and programming and have a lot of spare time. I like these things and are good at them, and I wouldn't try it using a Raspberry Pi unless somebody were willing to throw a lot of money at me.

  • I think you have very good points, do you know if a RAID SAS PCIe card can do the job ? I don't know if a RAID card must do RAID volumes or if it can connects HDD or Drives (such as tape drives) normally. Thanks a lot for the help. For information, I have this SAS Card: Rocket RAID HighPoint 4322 – Jonathan DEKHTIAR Jan 26 '18 at 13:33
  • Sorry, I wish I could help further. I have read that some SATA RAID cards will boot if the single drive isn't part of a RAID. – NomadMaker Jan 26 '18 at 16:07
  • No problem, if I don't have a better solution by the end of the bounty period related to the RPI I will accept your answer and you will get the reward. Thanks a lot – Jonathan DEKHTIAR Jan 26 '18 at 17:32

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.