Error: flash device is not found on arista 7050 qx32

[lguohan]

[+ echo varlog_size=100^M ]
 [+ [ raven = raven ]^M ]
 [+ aboot_machine=arista_7050_qx32^M ]
 [+ echo modprobe.blacklist=radeon^M ]
 [+ [ raven = crow ]^M ]
 [+ [  = Upperlake ]^M ]
 [+ [ -e /machine.conf ]^M ]
 [+ write_machine_config^M ]
 [+ grep ^Aboot /etc/cmdline^M ]
 [+ sed s/^.*norcal.-//^M ]
 [+ aboot_version=2.0.9-1287509^M ]
 [+ stat -c %y /bin/sysinit^M ]
 [+ sed s/ /T/^M ]
 [+ aboot_build_date=2013-06-07T15:42:00.000000000^M ]
 [+ cat^M]
 [ ]
 [+ [ -f /mnt/flash/image-20170604.01/kernel-params ]^M ]
 [+ grep -q root= /tmp/append^M ]
 [+ cut+ +  -f1grepmount -d ^M ]
 [ /mnt/flash^M ]
 [^M ]
 [+ rootdev=/dev/sda1^M ]
 [+ cut -f5 -d + ^M ]
 [+ mount^M ]
 [grep /mnt/flash^M ]
 [+ rootfstype=vfat^M ]
 [+ echo root=/dev/sda1^M ]
 [+ initrd_path=/mnt/flash/image-20170604.01/boot/initrd.img-3.16.0-4-amd64^M ]
 [+ kernel_path=/mnt/flash/image-20170604.01/boot/vmlinuz-3.16.0-4-amd64^M ]
 [+ tr \n  ^M ]
 [+ cmdline= SWI=flash:/sonic-aboot-broadcom-20170604.01.swi tsc=reliable pcie_ports=native console=ttyS0 reboot=p block_f[   64.871278] Starting new kernel^M ]
 [lash=pci0000:00/[    1.926206] i8042: No controller found^M]
 [ ]
 [Loading, please wait...^M ]
 [[    3.609705] sd 4:0:0:0: [sda] No Caching mode page found^M ]
 [[    3.673141] sd 4:0:0:0: [sda] Assuming drive cache: write through^M ]
 [Error: flash device is not found^M ]
 [fsck from util-linux 2.25.2^M ]
 [[    4.373980] aufs test_linkable:303:exe[174]: rw (vfat) doesn't support link(2), use noplink and rw+nolwh^M ]
 [[    4.487277] aufs test_add:256:exe[174]: bad index 1^M ]
 [mount: mounting root-aufs on /root failed: Numerical argument out of domain^M ]
 [[    4.885467] systemd[1]: [/etc/systemd/system/vas.service:6] Executable path is not absolute, ignoring: mkdir -p /var/opt/quest/vas/vasd^M ]
 [[    5.031001] systemd[1]: [/etc/systemd/system/vas.service:7] Executable path is not absolute, ignoring: mkdir -p /lib/x86_64-linux-gnu/security^M ]
 [[^[[1;31mFAILED^[[0m] Failed to start Various fixups to make systemd work better on Debian.^M ]
 [See 'systemctl status debian-fixup.service' for details.^M ]
 [[^[[1;31mFAILED^[[0m] Failed to start Load/Save Random Seed.^M ]
 [See 'systemctl status systemd-random-seed.service' for details.^M ]
 [[^[[32m  OK  ^[[0m] Started Create Static Device Nodes in /dev.^M ]
 [         Starting udev Kernel Device Manager...^M ]
 [[^[[32m  OK  ^[[0m] Reached target Local File Systems (Pre).^M ]
 [[^[[32m  OK  ^[[0m] Reached target Local File Systems.^M ]
 [         Starting netfilter persistent configuration...^M ]
 [         Starting Create Volatile Files and Directories...^M ]
 [[^[[32m  OK  ^[[0m] Reached target Remote File Systems.^M ]
 [         Starting Trigger Flushing of Journal to Persistent Storage...^M ]
 [         Starting LSB: AppArmor initialization...^M ]
 [         Starting LSB: Raise network interfaces....^M ]
 [[^[[32m  OK  ^[[0m] Started udev Kernel Device Manager.^M ]
 [[^[[32m  OK  ^[[0m] Started Create Volatile Files and Directories.^M ]
 [[^[[32m  OK  ^[[0m] Found device /dev/ttyS0.^M ]
 [[^[[32m  OK  ^[[0m] Started Trigger Flushing of Journal to Persistent Storage.^M ]
 [[^[[32m  OK  ^[[0m] Started netfilter persistent configuration.^M ]
 [[^[[32m  OK  ^[[0m] Started LSB: AppArmor initialization.^M ]
 [[^[[32m  OK  ^[[0m] Created slice system-ifup.slice.^M ]
 [         Starting Update UTMP about System Boot/Shutdown...^M ]
 [         Starting Copy rules generated while the root was ro...^M ]
 [[^[[1;31mFAILED^[[0m] Failed to start Update UTMP about System Boot/Shutdown.^M ]
 [See 'systemctl status systemd-update-utmp.service' for details.^M ]
 [[^[[1;33mDEPEND^[[0m] Dependency failed for Update UTMP about System Runlevel Changes.^M ]
 [[^[[1;31mFAILED^[[0m] Failed to start Copy rules generated while the root was ro.^M ]
 [See 'systemctl status udev-finish.service' for details.^M]
 [ ]
 [ ]

[stcheng]

Check the console to see [Error: flash device is not found^M ].

[stcheng]

dfadmin@sonic:~$ df -h                               
Filesystem      Size  Used Avail Use% Mounted on     
cgroup          2.0G     0  2.0G   0% /sys/fs/cgroup