misc/152613: FreeBSD 8.x can not find logical drives on extended partition in some cases

[Andy Alex]

>Number:         152613
>Category:       misc
>Synopsis:       FreeBSD 8.x can not find logical drives on extended partition in some cases
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Nov 27 12:40:06 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Andy Alex
>Release:        FreeBSD 8.1
>Organization:
N/A
>Environment:
FreeBSD freebsd.r-tt.com 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 02:55:53 UTC 2010     root at almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386
>Description:
FreeBSD 8.x can not find logical drives on extended partition if drive is connected via external USB HDD box in some cases.
>How-To-Repeat:
Take a empty ATA HDD (i used 120GB drive). Connect it to computer using USB HDD Box. Under Windows XP, create primary 10000 MB partition. Then create extended partition covering rest of the drive (about 110GB). Then create 10000 MB logical drive on the extended partition, then create another 10000 MB logical drive on extended partition. As a result there should be three 10000 MB partition - one primary partition and two logical ones. Format all of them as FAT32. Disconnect USB HDD Box from Windows XP host and connect to Free BSD 8 host. Free BSD will detect only primary partition (/dev/da0s1) and will not detect logical ones.
FreeBSD 7.2 was able to detect all partitions (/dev/da0s1,/dev/da0s5,/dev/da0s6)
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: