pathname of chunk

I recently changed the disk array which makes up my 1 raw device (1 chunk) with my rootdbspace and another dbspace. The chunk is slightly bigger than the one it replaced. 2 gig now instead of 1.8 gig. I dbexported the database before replacing the disk array, then re initialized the online instance with new values for total size and offsets for the dbspaces. While inputting the info for the path of my second dbspace (which holds the 1 database we use) it would not allow me to enter the same path name used for rootdbspace with an offset. BEFORE I made the change the pathname for my chunk was the same for both dbspaces with an offset "/dev/_online_root" which is/was linked to "/dev/rdsk/vdisk10" ( the disk array). I have linked the raw device "/dev/rdsk/vdisk10" to "/dev/online_root" but /dev/online_root will not work as path for my second dbspace now. I instead had to give the path /dev/rdsk/vdisk10 as pathname for the second dbspace with its offset from rootdbspace. Can anyone tell me why this happened????? Also Why does the informix manual stress not to rely on dbexport for any type of backup of the database? If it is good enough for migration why not backup? (given the size of the database is not too big) I do level 0 archive and also a dbexport which gets put to tape and disk each night. Thank God I did since there were several times my archive was bad due to bad disk blocks. Online 5.0 on a Star Server E 660 w disk array plus v 1.0 (speed is great!) Well enough already.. Thanks for any info in advance. Also thanks to Mr. Parker and Leffler for their help with earlier questions I had. Brian London IS Director JM Rodgers Co., Inc. 245 Woodport Rd Sparta, NJ 07871 (201) 729-6700 london@drawbax.attmail.com