Verifying Routing Engine Failure ! 151
Chapter 14: Monitoring the Routing Engine
When the Compact Flash Is Removed from the Boot List
You can have a compact flash error when conditions, such as a HARD READ error
occurs. When the compact flash is removed from the boot list, the following
message displays you log in to the router:
login: user
--- JUNOS 6.0R1.6 built 2003-09-24 04:06:27 UTC
---
--- NOTICE: System is running on alternate media device (/dev/ad1s1a).
---
user@host>
Action Check to see which file system is mounted by using the following CLI command:
user@host> show system storage
Sample Output
user@host> show system storage
Filesystem 512-blocks Used Avail Capacity Mounted on
/dev/ad1s1a 218690 56502 144694 28% /
devfs 32 32 0 100% /dev/
/dev/vn0 18316 18316 0 100% /packages/mnt/jbase
devfs 32 32 0 100% /dev/
/dev/vn1 45448 45448 0 100%
/packages/mnt/jkernel-6.0R1.6
/dev/vn2 20532 20532 0 100%
/packages/mnt/jpfe-M160-6.0R1.6
/dev/vn3 3580 3580 0 100%
/packages/mnt/jdocs-6.0R1.6
/dev/vn4 20728 20728 0 100%
/packages/mnt/jroute-6.0R1.6
/dev/vn5 9256 9256 0 100%
/packages/mnt/jcrypto-6.0R1.6
mfs:139 4064278 2 3739134 0% /tmp
/dev/ad1s1e 24234 4 22292 0% /config
procfs 8 8 0 100% /proc
/dev/ad1s1f 52492630 7988510 40304710 17% /var
What It Means The command output will not show ad0 (the compact-flash) mounted, but instead,
ad1 (the hard disk) has the root file system mounted.
Determine Why Compact Flash Did Not Mount
Action To determine why the compact-flash did not get mounted, use the following CLI
command:
user@host> show system boot-messages | match "ad0|ad1"
user@host>
show system boot-messages | match "ad0|ad1"
ad0: not attached, missing in Boot List
ad1: 28615MB <FUJITSU MHS2030AT> [58140/16/63] at ata0-slave using BIOSDMA
Mounting root from ufs:/dev/ad1s1a
What It Means The command output shows that the compact flash (ad0) was removed from the
boot list.
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