On 29 Nov 2012, at 12:50, Dave McGuire <mcguire at neurotica.com> wrote: On 11/29/2012 12:37 PM, Oleg Safiullin wrote: I've currently got 3 x 127 GB PATA drives on CHIMPY - what is the largest drive this machine (DS10) will be capable of using? "Compaq AlphaServer DS10 Systems, Technical Summary": Page 7: --- Disks supported are 20 and 40 GB IDE disks and 18.2 and 36.4 GB UltraSCSI disks. In addition, a 72.8 GB universal wide Ultra3 SCSI disk is supported with the front access storage cage. Page 12 --- System storage 108 GB SCSI or 120 GB IDE with internal storage cage or 218 GB SCSI with front access storage cage -- I'm using two IDE disks: 80Gb and 120Gb. Uhh..."supported" and "will work" are often two very different things in DECland. I wouldn't consider a documentation quote very authoritative here at all. That said, the DS10 is a fairly late-model Alpha, introduced in 1999. I'd expect it to at least support 28-bit LBA, topping out at ~137GB, but it may support 48-bit LBA (BIG). I don't recall ever having used a drive larger than 120GB on a DS10. Of course for SCSI, the real limit may be much higher. There are lots of ways to get big storage on a PCI-based Alpha. Were there any 66MHz/64-bit PCI alphas? Maybe a PCI-X alpha? -Dave -- Dave McGuire, AK4HZ New Kensington, PA