When analyzing the logfile it looks like /dev is hardcoded for exclusion in the Backup Exec server or unix agent. This is the logfile on SUSE 9 (hostname linux64) when only /dev is selected for backup:
56c65bb0 Mon Sep 12 14:20:58 2005: ====>VX_CreateTempDLE
56c65bb0 Mon Sep 12 14:20:58 2005: VX_CreateTempDLE: Creating DLE: \\linux64
56c65bb0 Mon Sep 12 14:20:58 2005: 22 = 0
56c65bb0 Mon Sep 12 14:20:58 2005: ====>VX_AttachToDLE
56c65bb0 Mon Sep 12 14:20:58 2005: Resetting hard link info
56c65bb0 Mon Sep 12 14:20:58 2005: Hard link info has been reset
56c65bb0 Mon Sep 12 14:20:58 2005: BlowupChildren: Did not find DLE \\linux64\ in list. Creating new.
56c65bb0 Mon Sep 12 14:20:58 2005: Attach to \
56c65bb0 Mon Sep 12 14:20:58 2005: ====>VX_AttachToDLE
56c65bb0 Mon Sep 12 14:20:58 2005: Resetting hard link info
56c65bb0 Mon Sep 12 14:20:58 2005: Hard link info has been reset
56c65bb0 Mon Sep 12 14:20:58 2005: Attach to \
56c65bb0 Mon Sep 12 14:20:58 2005: Detach from \
56c65bb0 Mon Sep 12 14:20:58 2005: Resetting hard link info
56c65bb0 Mon Sep 12 14:20:58 2005: Hard link info has been reset
56c65bb0 Mon Sep 12 14:20:58 2005: line = "\\linux64\/dev/*.*",s,v0,t0,l0,n0,f0
56c65bb0 Mon Sep 12 14:20:58 2005: dir = dev
56c65bb0 Mon Sep 12 14:20:58 2005: file = *.*
56c65bb0 Mon Sep 12 14:20:58 2005: oper = Include
56c65bb0 Mon Sep 12 14:20:58 2005: subs = True
56c65bb0 Mon Sep 12 14:20:58 2005: wild = True
56c65bb0 Mon Sep 12 14:20:58 2005: attr_on_mask = 0
56c65bb0 Mon Sep 12 14:20:58 2005: attr_off_mask = 0
56c65bb0 Mon Sep 12 14:20:58 2005: line = "\\linux64\/sys/*.*",s,x,v0,t0,l0,n0,f0
56c65bb0 Mon Sep 12 14:20:58 2005: dir = sys
56c65bb0 Mon Sep 12 14:20:58 2005: file = *.*
56c65bb0 Mon Sep 12 14:20:58 2005: oper = Exclude
56c65bb0 Mon Sep 12 14:20:58 2005: subs = True
56c65bb0 Mon Sep 12 14:20:58 2005: wild = True
56c65bb0 Mon Sep 12 14:20:58 2005: attr_on_mask = 0
56c65bb0 Mon Sep 12 14:20:58 2005: attr_off_mask = 0
56c65bb0 Mon Sep 12 14:20:59 2005: used default formatting (\proc\*.*) when loading hardcoded exclusi
on files
56c65bb0 Mon Sep 12 14:20:59 2005: used default formatting (\sys\*.*) when loading hardcoded exclusio
n files
56c65bb0 Mon Sep 12 14:20:59 2005: used default formatting (\cdrom\*.*) when loading hardcoded exclus
ion files
56c65bb0 Mon Sep 12 14:20:59 2005: Status 536935943 loading FilesNotToBackup exclude files when enumerating excl
ude files
56c65bb0 Mon Sep 12 14:20:59 2005: used default formatting (\dev\*) when loading hardcoded exclusion
files
56c65bb0 Mon Sep 12 14:20:59 2005: used default formatting (\xfn\*) when loading hardcoded exclusion
files
56c65bb0 Mon Sep 12 14:20:59 2005: VX_EnumExcludedFiles: FilesNotToBackup and Hardcoded exclusion files:
56c65bb0 Mon Sep 12 14:20:59 2005: \proc\*.* /s
56c65bb0 Mon Sep 12 14:20:59 2005: \sys\*.* /s
56c65bb0 Mon Sep 12 14:20:59 2005: \cdrom\*.* /s
56c65bb0 Mon Sep 12 14:20:59 2005: \dev\* /s
56c65bb0 Mon Sep 12 14:20:59 2005: \xfn\* /s
56c65bb0 Mon Sep 12 14:20:59 2005: ====>VX_GetLocalDeviceName: device_name is
56c65bb0 Mon Sep 12 14:20:59 2005: ====>VX_GetLocalDeviceName: device_name is
56c65bb0 Mon Sep 12 14:20:59 2005: ====>VX_GetLocalDeviceName: device_name is
56c65bb0 Mon Sep 12 14:20:59 2005: ====>VX_GetLocalDeviceName: device_name is
56c65bb0 Mon Sep 12 14:20:59 2005: ====>VX_GetLocalDeviceName: device_name is
56c65bb0 Mon Sep 12 14:20:58 2005: ====> VX_FindNext
56c65bb0 Mon Sep 12 14:20:58 2005: vx_stat_by_name: Getting stat of /dev/ac
56c65bb0 Mon Sep 12 14:20:58 2005: SkipObject: f_type is 4, returning TRUE
56c65bb0 Mon Sep 12 14:20:58 2005: vx_stat_by_name: Getting stat of /dev/fb
56c65bb0 Mon Sep 12 14:20:58 2005: ====> VX_FindNext
56c65bb0 Mon Sep 12 14:20:58 2005: vx_stat_by_name: Getting stat of /dev/fd
56c65bb0 Mon Sep 12 14:20:58 2005: ====> VX_FindNext
56c65bb0 Mon Sep 12 14:20:58 2005: vx_stat_by_name: Getting stat of /dev/ip
56c65bb0 Mon Sep 12 14:20:58 2005: SkipObject: f_type is 4, returning TRUE
56c65bb0 Mon Sep 12 14:20:58 2005: vx_stat_by_name: Getting stat of /dev/ni