Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!mailrus!wuarchive!texbell!bigtex!pmafire!dave From: dave@pmafire.UUCP (Dave Remien) Newsgroups: comp.sys.hp Subject: Disktab, newfs SCSI drives on HP9000/370 Keywords: disktab newfs df 370 argh!!! Message-ID: <787@pmafire.UUCP> Date: 29 Sep 89 15:53:00 GMT Lines: 88 OK, all you cognizant HP types out there in netland: I'm pretty (no, make that totally) confused by the following disktab stuff on my two 370s, both with HP7959S drives (one with two), running HP-UX version 6.5. Let me explain a bit more: On my machine with two 7959S drives, I'm trying to split 24 megs of swap space between the two disks, 12 megs a piece. The disktab entries follow. (Stock HP). ############################################### # The HP7959S has 12 surfaces (6 platters) # Total formatted capacity: 323 MBytes hp7959S_noswap|HP7959S_noswap:\ :No swap:ns#16:nt#12:nc#1643:\ :s0#315456:b0#8192:f0#1024:\ :se#256:rm#3350: hp7959S|HP_7959S:\ :42 MBytes swap:ns#16:nt#12:nc#1419:\ :s0#272448:b0#8192:f0#1024:\ :se#256:rm#3350: hp7959S_16MB|HP7959S_16MB:\ :16 MBytes swap:ns#16:nt#12:nc#1472:\ :s0#298906:b0#8192:f0#1024:\ :se#256:rm#3350: hp7959S_32MB|HP7959S_32MB:\ :32 MBytes swap:ns#16:nt#12:nc#1472:\ :s0#282624:b0#8192:f0#1024:\ :se#256:rm#3350: See anything weird about this yet? I'm baffled by the fact that nc for the 16MB swap and 32MB swap entries are *exactly* the same. Looking at the 42MB swap and no swap entries, I'm led to believe that: a. nc goes down by 5.333 cylinders per MB of swap and b. s0 (roughly) goes down by 1024 sectors per MB of swap. Except for the 16MB swap entry. OK. I make a new entry for my two 7959S drives that I want to have 12 MB of swap each like so: hp7959S_12MB|HP7959S_12MB:\ :12 MBytes swap:ns#16:nt#12:nc#1578:\ :s0#303168:b0#8192:f0#1024:\ :se#256:rm#3350: Then I turn newfs loose, and it *tells* me that its making a 310MB file system on my drive. The kicker is from df: /extra (/dev/dsk/1s0 ): 511436 blocks 139388 i-nodes 568284 total blocks 139392 total i-nodes 18 used blocks 4 used i-nodes 10 percent minfree / (/dev/dsk/0s0 ): 40612 blocks 129031 i-nodes 568284 total blocks 139392 total i-nodes 470842 used blocks 10361 used i-nodes 10 percent minfree Or, if you're a dfspace type, Disk space ( /extra ): 249.72 MB of 277.48 MB available (90.00%), Disk space ( / ): 19.97 MB of 277.48 MB available ( 7.20%), Total disk space: 269.70 MB of 554.96 MB available (48.60%). Which tells me that I've got either a 290961408 byte or a 277.5MB (not the same, but I haven't gone back thru dfspace to see what it's awking) file system, but certainly not a 310Mb file system. My question is, where did it (my extra 20MB or 30MB) go? What the heck is going on??????? Is disktab as messed up as I think it is? Am I all wet? Anybody? -- Dave Remien - WINCO Computer Eng. Group -{uunet | bigtex}!pmafire!dave- "And who's birthday is today?" "Why, nobody, Hugh" (Firesign "In history, Patty, before they changed the water...." Theater)