Re: Can't add chunk to dbspace (Grrr!)

Dear Anders, A quicker way to do it is with offsets ie dd if=/dev/rawdevice of=/dev/null bs=1024k count=1 iseek=200 If this works the chunk is bigger that 200mb. Keep trying higher iseek values until you get an error and workout the size that way. It takes on our system nearly 1 hour to read 2GB. Regards, Jason On Thu, 11 Sep 1997 09:28:28 +0200, Anders Karlsson <andersk@cybercom.se> wrote: >Hi! > > This might well be a bug, I don''t know. One little trick to figure out >how bit the chunk REALLY is, i.e. how big does >UNIX think your rawdevice is, is to run a dd from the devive to /dev/null >and then looking at the number of copied blocks that dd reports. It's >usually easier (and faster) to run it with a bigger than the defaul >blocksize, i.e.: >dd if=/dev/rdsk/c0b0t4d0s1 of=/dev/null bs=16384 >which will tell you how many 16K block the device has. If this puppy reports >600M, UnixWare is mixed up, if it reports 1G, ODS is.... > >Hope this helps >Karlsson >Cosmo Lee wrote: > >> ODS 7.22, Unixware 2.1.1, Compaq Proliant 1500 >> >> Can someone tell me if I'm doing something wrong? >> >> I am adding a chunk to an existing dbspace. I have a 4GB drive I've >> divided into 1GB slices. I'm trying to add a 1GB slice to a dbspace, >> but `onspaces` won't let me do it, telling me that the slice is too >> small for the chunk size indicated. I can only do this if I reduce the >> chunk size request from 1GB to 600MB. >> >> Here's my link to the raw device: >> >> lrwxrwxrwx 1 informix informix 20 Aug 14 01:13 >> allcards_dbs_3_cnk_2 -> >> /dev/rdsk/c0b0t4d0s1 >> >> Here's the VTOC info, showing the slice to be 1024MB in size: >> (1024 cyls = 1024MB = 1GB) >> >> # prtvtoc /dev/rdsk/c0b0t4d0s0 >> [snip] >> slice 1: USER permissions: VALID UNMOUNTABLE >> starting sector: 2048 (cyl 1) length: 2097152 (1024.00 >> cyls) >> >> Here are my attempts at running `onspaces`: >> >> $ onspaces -a allcards_dbs_3 -p >> /home/informix/chunks/allcards_dbs_3_cnk_2 >> -o 0 -s 1024000>> Verifying physical disk space, please wait ... >> The chunk '/home/informix/chunks/allcards_dbs_3_cnk_2' will not fit in >> the space >> specified. >> >> $ onspaces -a allcards_dbs_3 -p >> /home/informix/chunks/allcards_dbs_3_cnk_2 -o 0 -s 900000>> Verifying physical disk space, please wait ... >> The chunk '/home/informix/chunks/allcards_dbs_3_cnk_2' will not fit in >> the space >> specified. >> >> $ onspaces -a allcards_dbs_3 -p >> /home/informix/chunks/allcards_dbs_3_cnk_2 -o 0 -s 800000>> Verifying physical disk space, please wait ... >> The chunk '/home/informix/chunks/allcards_dbs_3_cnk_2' will not fit in >> the space >> specified. >> >> $ onspaces -a allcards_dbs_3 -p >> /home/informix/chunks/allcards_dbs_3_cnk_2 -o 0 -s 700000>> Verifying physical disk space, please wait ... >> The chunk '/home/informix/chunks/allcards_dbs_3_cnk_2' will not fit in >> the space >> specified. >> >> It finally works when I only request 600MB of the 1GB slice(!): >> >> $ onspaces -a allcards_dbs_3 -p >> /home/informix/chunks/allcards_dbs_3_cnk_2 -o 0 -s 600000>> Verifying physical disk space, please wait ... >> Chunk successfully added. >> >> Any clues? Am I doing something wrong here??? >> >> Thanks in advance. >> >> -- >> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * >> ADDRESS ALTERED TO FOIL SPAMMERS: Remove "*NO-SPAM*" to reply. >> >> Cosmo Lee Multi-User Computer Systems Brooklyn, NY >> >> "JUST SAY 'NO' TO SPAM" >> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * > > >