IDE Zip drive

[Paul Lewis <paul lewis karachi freeuk com>]

I am running redhat 6.0. Dmesg reports the drive reports two different
capicities. printout as follows

hda: Maxtor 83240D4, ATA DISK drive
hdb: IOMEGA ZIP 100 ATAPI Floppy, ATAPI FLOPPY drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hda: Maxtor 83240D4, 3089MB w/256kB Cache, CHS=6696/15/63
FDC 0 is a post-1991 82077
md driver 0.90.0 MAX_MD_DEVS=256, MAX_REAL=12

and then


hdb: 98288kB, 196576 blocks, 512 sector size
hdb: 98304kB, 96/64/32 CHS, 4096 kBps, 512 sector size, 2941 rpm
hdb: The drive reports both 100663296 and 100646912 bytes as its
capacity
 hdb: hdb1 hdb2 hdb3 hdb4
hdb: The drive reports both 100663296 and 100646912 bytes as its
capacity
VFS: Disk change detected on device ide0(3,64)
 hdb: hdb1 hdb2 hdb3 hdb4

Can anyone see what the problem is?
In fstab I have the drive defined but with msdos as the file system
no other parameters as follows.

/dev/cdrom    		/mnt/cdrom	iso9660	 user,exec,dev,suid,ro,noauto 0 0
/dev/hdb        	/mnt/zip   msdos

I presume this is incorrect. How should I define my IDE Zip drive?