On Thursday 13 January 2005 13:08, Randall A. Jones wrote: > This SCSI card is an Adaptec 39160. > The RAID is a Nexsan ATABoy2 with a SCSI interface. > It seems that the driver recognizes the need and is trying to use the > READ(16) command but that it is failing. > from log: > > sdc : very big device. try to use READ CAPACITY(16). > sdc : READ CAPACITY(16) failed. > > I'm assuming the Nexsan device will work correctly given a capable > controller and OS/driver. It has a special mode that allows >2.1TB LUNs to > be created. The default system config only allows for 2199023 MB LUNs > (~2.1TB). > Nexsan engineers don't have a firm answer for me on this issue. They are > not aware of any of their customers using a LUN this large on their device > but they say it should work given a capable system. > > I can put a Fiberchannel controller in the ATABoy2 RAID unit. Then connect > to a Fiberchannel HBA on the server. Is it possible that there is a > capable FC HBA that can do SCSI-3 and 16byte SCSI commands properly to > handle the large device? I have a QLogic 2342 HBA on hand and the specs for > the card state that it has "SCSI-3 Fibre Channel Protocol (SCSI-FCP)" > "compliance". Is it possible this will work? > > I've heard that LSI might have a similar capability. > > Thanks for the info and discussion. > > Randall Randall, We got a 3.4TB raid running on a LSI controller - unfortunately not with Linux. But at least that way I know the 16byte command support works on the card. Since QLogic and their oems like sun never say anything about these capabilities I doubt that it works there... Oh, the LSI press release is at: http://www.infortrend.com/%5CNews%5C20041006%5Cf_64Bit_LBA.htm and mentions the 2.6 kernel... Peter.
