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I'm looking to install Proxmox on my MacPro3,1 and it's suggested that if you plan to use the system for 5 years that you install a Hardware RAID card with a battery in it, so that if the power goes out your "last writes" will be written before the machine runs out of juice.

Are there any Hardware RAID cards I can use in this machine? Also, how does one know when the battery on the card is dying?

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As the 3,1 is essentially an unsupported machine [sadly] I'd go for a second-hand Apple card from eBay etc, to save any possible compatibility issues with a 3rd party new card that may never have been designed with the 08 Mac Pro in mind.

The official Mac Pro RAID cards themselves come in 2 flavours, pre & post 2009

Unless it's a refurb, I would also change the battery, new ones are still available.

UK prices, old RAID card for an Early 2008, approx £200, new battery £50

See Mac Pro (Mid 2012 and earlier): Frequently Asked Questions about the Mac Pro RAID Card and Xserve RAID Card

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    Note that the O/S will notify you when the battery is dying and it is not a catastrophe as the RAID config is written to each drive in the RAID container and is easily recoverable. – Steve Chambers Dec 19 '14 at 21:11
  • Good point, +1 ... I just thought better safe than sorry on a potentially 6-year-old device – Tetsujin Dec 19 '14 at 21:18

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