Re: Dell SAS6IR is it worth the effort to convert to IT
On Thu, Sep 13, 2018 at 9:03 AM, Josh Paetzel wrote: > > > On Thu, Sep 13, 2018, at 10:58 AM, Lee Brown wrote: > > Hi, > > > > I'm in the process of setting up an old PowerEdge R410 which has, I > > believe, the LSI Logic AS1068, using the mpt driver. > > > > I'm not interested in running it as a hardware RAID but rather a > > geli(authentication only)+gmirror+gjournal. > > > > It seems like flashing it requires booting into dos, which frankly I > can't > > be bothered with. mptutil doesn't appear to have that capability. > > > > Are there any major downsides to running it in IR mode as two disks? > > There's no option to turn off the write-cache, but being battery backed > the > > only danger I see with that is if the machine is powered with pending > > writes on the card and the battery gives out before power is restored. > > > > The use case is routing/snort IPS with minimal logging, so disk > performance > > isn't critical. It will be the redundant router so mostly doing nothing > > except the little work OSPF needs. > > > > Thanks in advance for any comments -- lee > > ___ > > freebsd-hardware@freebsd.org mailing list > > https://lists.freebsd.org/mailman/listinfo/freebsd-hardware > > To unsubscribe, send any mail to "freebsd-hardware-unsubscribe@ > freebsd.org" > > On those controllers IR mode is just IT mode with the ability to create > RAID. If you don't create a RAID array it behaves exactly like an IT > controller. > > And yes, FreeBSD mptutil doesn't have the ability to erase the flash, > which you need to be able to do to go from IR to IT. DOS is the typical > answer for that. > Thanks a lot Josh, most appreciated. ___ freebsd-hardware@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "freebsd-hardware-unsubscr...@freebsd.org"
Re: Dell SAS6IR is it worth the effort to convert to IT
On Thu, Sep 13, 2018, at 10:58 AM, Lee Brown wrote: > Hi, > > I'm in the process of setting up an old PowerEdge R410 which has, I > believe, the LSI Logic AS1068, using the mpt driver. > > I'm not interested in running it as a hardware RAID but rather a > geli(authentication only)+gmirror+gjournal. > > It seems like flashing it requires booting into dos, which frankly I can't > be bothered with. mptutil doesn't appear to have that capability. > > Are there any major downsides to running it in IR mode as two disks? > There's no option to turn off the write-cache, but being battery backed the > only danger I see with that is if the machine is powered with pending > writes on the card and the battery gives out before power is restored. > > The use case is routing/snort IPS with minimal logging, so disk performance > isn't critical. It will be the redundant router so mostly doing nothing > except the little work OSPF needs. > > Thanks in advance for any comments -- lee > ___ > freebsd-hardware@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hardware > To unsubscribe, send any mail to "freebsd-hardware-unsubscr...@freebsd.org" On those controllers IR mode is just IT mode with the ability to create RAID. If you don't create a RAID array it behaves exactly like an IT controller. And yes, FreeBSD mptutil doesn't have the ability to erase the flash, which you need to be able to do to go from IR to IT. DOS is the typical answer for that. -- Thanks, Josh Paetzel ___ freebsd-hardware@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "freebsd-hardware-unsubscr...@freebsd.org"
Dell SAS6IR is it worth the effort to convert to IT
Hi, I'm in the process of setting up an old PowerEdge R410 which has, I believe, the LSI Logic AS1068, using the mpt driver. I'm not interested in running it as a hardware RAID but rather a geli(authentication only)+gmirror+gjournal. It seems like flashing it requires booting into dos, which frankly I can't be bothered with. mptutil doesn't appear to have that capability. Are there any major downsides to running it in IR mode as two disks? There's no option to turn off the write-cache, but being battery backed the only danger I see with that is if the machine is powered with pending writes on the card and the battery gives out before power is restored. The use case is routing/snort IPS with minimal logging, so disk performance isn't critical. It will be the redundant router so mostly doing nothing except the little work OSPF needs. Thanks in advance for any comments -- lee ___ freebsd-hardware@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "freebsd-hardware-unsubscr...@freebsd.org"
