After powering off my ERL to prepare it for some wire maintnence, the router is no longer responsive on boot with the following output shown in Console. The first entry reflects a normal boot attempt, the 2nd an attempt after the reset button has been held is attached due to post limits.
A similar post suggests to reach out to @UBNT-MikeD for some additional tests/steps to be taken, but I am unsure how to contact or summon Mike aside from a post here. 
Any guidance/sugestions anyone is able to provide is greatly appreciated. Thank you in advance!
[2016-09-06 10:58:44]
[2016-09-06 10:58:44] Looking for valid bootloader image....
[2016-09-06 10:58:44] Jumping to start of image at address 0xbfc80000
[2016-09-06 10:58:44]
[2016-09-06 10:58:44]
[2016-09-06 10:58:44] U-Boot 1.1.1 (UBNT Build ID: 4493936-g009d77b) (Build time: Sep 20 2012 - 15:48:51)
[2016-09-06 10:58:44]
[2016-09-06 10:58:44] BIST check passed.
[2016-09-06 10:58:45] UBNT_E100 r1:2, r2:14, serial #: XXXXXXXXXXXX
[2016-09-06 10:58:45] Core clock: 500 MHz, DDR clock: 266 MHz (532 Mhz data rate)
[2016-09-06 10:58:45] DRAM: 512 MB
[2016-09-06 10:58:45] Clearing DRAM....... done
[2016-09-06 10:58:45] Flash: 4 MB
[2016-09-06 10:58:45] Net: octeth0, octeth1, octeth2
[2016-09-06 10:58:45]
[2016-09-06 10:58:45] USB: (port 0) scanning bus for devices... 1 USB Devices found
[2016-09-06 10:58:47] scanning bus for storage devices...
[2016-09-06 10:58:49] Device 0: Vendor: Prod.: USB DISK 2.0 Rev: PMAP
[2016-09-06 10:58:49] Type: Removable Hard Disk
[2016-09-06 10:58:49] Capacity: 3700.6 MB = 3.6 GB (7579008 x 512)
[2016-09-06 10:58:51] 0
[2016-09-06 10:58:51] reading vmlinux.64
[2016-09-06 10:58:51] ..................................
[2016-09-06 10:58:51]
[2016-09-06 10:58:51] 6866056 bytes read
[2016-09-06 10:58:51] argv[2]: coremask=0x3
[2016-09-06 10:58:51] argv[3]: root=/dev/sda2
[2016-09-06 10:58:51] argv[4]: rootdelay=15
[2016-09-06 10:58:51] argv[5]: rw
[2016-09-06 10:58:51] argv[6]: rootsqimg=squashfs.img
[2016-09-06 10:58:51] argv[7]: rootsqwdir=w
[2016-09-06 10:58:51] argv[8]: mtdparts=phys_mapped_flash:512k(boot0),512k(boot1),64k@3072k(eeprom)
[2016-09-06 10:58:51] ELF file is 64 bit
[2016-09-06 10:58:51] Allocating memory for mapped kernel segment, alignment: 0x400000
[2016-09-06 10:58:51] Allocated memory for ELF segment: addr: 0x400000, size 0x7de180
[2016-09-06 10:58:51] Processing PHDR 0
[2016-09-06 10:58:51] Loading 68ae80 bytes at 400000
[2016-09-06 10:58:51] Clearing 153300 bytes at a8ae80
[2016-09-06 10:58:51] ## Loading Linux kernel with entry point: 0x008e8af0 ...
[2016-09-06 10:58:51] Bootloader: Done loading app on coremask: 0x3
[2016-09-06 10:58:51] Linux version 3.10.20-UBNT (root@ubnt-builder2) (gcc version 4.7.0 (Cavium Inc. Version: SDK_3_1_0_p2 build 34) ) #1 SMP Sat May 28 09:46:11 PDT 2016
[2016-09-06 10:58:51] CVMSEG size: 2 cache lines (256 bytes)
[2016-09-06 10:58:51] Cavium Inc. SDK-3.1
[2016-09-06 10:58:51] bootconsole [early0] enabled
[2016-09-06 10:58:51] CPU revision is: 000d0601 (Cavium Octeon+)
[2016-09-06 10:58:51] Checking for the multiply/shift bug... no.
[2016-09-06 10:58:51] Checking for the daddiu bug... no.
[2016-09-06 10:58:51] Determined physical RAM map:
[2016-09-06 10:58:51] memory: 0000000007400000 @ 0000000000c00000 (usable)
[2016-09-06 10:58:51] memory: 0000000007c00000 @ 0000000008200000 (usable)
[2016-09-06 10:58:51] memory: 000000000fc00000 @ 0000000410000000 (usable)
[2016-09-06 10:58:51] memory: 0000000000648000 @ 0000000000400000 (usable)
[2016-09-06 10:58:52] memory: 0000000000048000 @ 0000000000a48000 (usable after init)
[2016-09-06 10:58:52] Wasting 57344 bytes for tracking 1024 unused pages
[2016-09-06 10:58:52] software IO TLB [mem 0x01707000-0x01747000] (0MB) mapped at [8000000001707000-8000000001746fff]
[2016-09-06 10:58:52] Zone ranges:
[2016-09-06 10:58:52] DMA32 [mem 0x00400000-0xefffffff]
[2016-09-06 10:58:52] Normal [mem 0xf0000000-0x41fbfffff]
[2016-09-06 10:58:52] Movable zone start for each node
[2016-09-06 10:58:52] Early memory node ranges
[2016-09-06 10:58:52] node 0: [mem 0x00400000-0x00a8ffff]
[2016-09-06 10:58:52] node 0: [mem 0x00c00000-0x07ffffff]
[2016-09-06 10:58:52] node 0: [mem 0x08200000-0x0fdfffff]
[2016-09-06 10:58:52] node 0: [mem 0x410000000-0x41fbfffff]
[2016-09-06 10:58:52] Primary instruction cache 32kB, virtually tagged, 4 way, 64 sets, linesize 128 bytes.
[2016-09-06 10:58:52] Primary data cache 16kB, 64-way, 2 sets, linesize 128 bytes.
[2016-09-06 10:58:52] Secondary unified cache 128kB, 8-way, 128 sets, linesize 128 bytes.
[2016-09-06 10:58:52] PERCPU: Embedded 10 pages/cpu @8000000001784000 s11904 r8192 d20864 u40960
[2016-09-06 10:58:52] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 125887
[2016-09-06 10:58:52] Kernel command line: bootoctlinux $loadaddr coremask=0x3 root=/dev/sda2 rootdelay=15 rw rootsqimg=squashfs.img rootsqwdir=w mtdparts=phys_mapped_flash:512k(boot0),512k(boot1),64k@3072k(eeprom) console=ttyS0,115200
[2016-09-06 10:58:52] PID hash table entries: 2048 (order: 2, 16384 bytes)
[2016-09-06 10:58:52] Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)
[2016-09-06 10:58:52] Inode-cache hash table entries: 32768 (order: 6, 262144 bytes)
[2016-09-06 10:58:53] Memory: 495244k/510528k available (5077k kernel code, 15284k reserved, 1351k data, 288k init, 0k highmem)
[2016-09-06 10:58:53] Hierarchical RCU implementation.
[2016-09-06 10:58:53] Additional per-CPU info printed with stalls.
[2016-09-06 10:58:53] NR_IRQS:255
[2016-09-06 10:58:53] Calibrating delay loop (skipped) preset value.. 1000.00 BogoMIPS (lpj=5000000)
[2016-09-06 10:58:53] pid_max: default: 32768 minimum: 501
[2016-09-06 10:58:53] Security Framework initialized
[2016-09-06 10:58:53] Mount-cache hash table entries: 256
[2016-09-06 10:58:53] Checking for the daddi bug... no.
[2016-09-06 10:58:53] SMP: Booting CPU01 (CoreId 1)...
[2016-09-06 10:58:53] CPU revision is: 000d0601 (Cavium Octeon+)
[2016-09-06 10:58:53] Brought up 2 CPUs
[2016-09-06 10:58:53] NET: Registered protocol family 16
[2016-09-06 10:58:53] bio: create slab <bio-0> at 0
[2016-09-06 10:58:53] SCSI subsystem initialized
[2016-09-06 10:58:53] usbcore: registered new interface driver usbfs
[2016-09-06 10:58:53] usbcore: registered new interface driver hub
[2016-09-06 10:58:53] usbcore: registered new device driver usb
[2016-09-06 10:58:53] Switching to clocksource OCTEON_CVMCOUNT
[2016-09-06 10:58:53] NET: Registered protocol family 2
[2016-09-06 10:58:53] TCP established hash table entries: 4096 (order: 4, 65536 bytes)
[2016-09-06 10:58:53] TCP bind hash table entries: 4096 (order: 4, 65536 bytes)
[2016-09-06 10:58:53] TCP: Hash tables configured (established 4096 bind 4096)
[2016-09-06 10:58:53] TCP: reno registered
[2016-09-06 10:58:53] UDP hash table entries: 256 (order: 1, 8192 bytes)
[2016-09-06 10:58:53] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
[2016-09-06 10:58:53] NET: Registered protocol family 1
[2016-09-06 10:58:53] octeon_pci_console: Console not created.
[2016-09-06 10:58:53] /proc/octeon_perf: Octeon performance counter interface loaded
[2016-09-06 10:58:53] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[2016-09-06 10:58:53] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[2016-09-06 10:58:53] Registering unionfs 2.5.13 (for 3.10.34)
[2016-09-06 10:58:53] msgmni has been set to 967
[2016-09-06 10:58:53] io scheduler noop registered
[2016-09-06 10:58:53] io scheduler cfq registered (default)
[2016-09-06 10:58:53] Serial: 8250/16550 driver, 6 ports, IRQ sharing disabled
[2016-09-06 10:58:53] 1180000000800.serial: ttyS0 at MMIO 0x1180000000800 (irq = 34) is a OCTEON
[2016-09-06 10:58:53] console [ttyS0] enabled, bootconsole disabled
[2016-09-06 10:58:53] console [ttyS0] enabled, bootconsole disabled
[2016-09-06 10:58:53] 1180000000c00.serial: ttyS1 at MMIO 0x1180000000c00 (irq = 35) is a OCTEON
[2016-09-06 10:58:53] loop: module loaded
[2016-09-06 10:58:53] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[2016-09-06 10:58:53] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[2016-09-06 10:58:53] OcteonUSB 16f0010000000.usbc: Octeon Host Controller
[2016-09-06 10:58:53] OcteonUSB 16f0010000000.usbc: new USB bus registered, assigned bus number 1
[2016-09-06 10:58:53] OcteonUSB 16f0010000000.usbc: irq 56, io mem 0x00000000
[2016-09-06 10:58:53] hub 1-0:1.0: USB hub found
[2016-09-06 10:58:53] hub 1-0:1.0: 1 port detected
[2016-09-06 10:58:53] OcteonUSB: Registered HCD for port 0 on irq 56
[2016-09-06 10:58:53] usbcore: registered new interface driver usb-storage
[2016-09-06 10:58:53] octeon_wdt: Initial granularity 5 Sec
[2016-09-06 10:58:53] TCP: cubic registered
[2016-09-06 10:58:53] NET: Registered protocol family 17
[2016-09-06 10:58:53] NET: Registered protocol family 15
[2016-09-06 10:58:53] Bootbus flash: Setting flash for 4MB flash at 0x1f800000
[2016-09-06 10:58:53] phys_mapped_flash: Found 1 x16 devices at 0x0 in 8-bit bank. Manufacturer ID 0x0000c2 Chip ID 0x0000a7
[2016-09-06 10:58:53] Amd/Fujitsu Extended Query Table at 0x0040
[2016-09-06 10:58:53] Amd/Fujitsu Extended Query version 1.1.
[2016-09-06 10:58:53] phys_mapped_flash: Swapping erase regions for top-boot CFI table.
[2016-09-06 10:58:53] number of CFI chips: 1
[2016-09-06 10:58:53] 3 cmdlinepart partitions found on MTD device phys_mapped_flash
[2016-09-06 10:58:53] Creating 3 MTD partitions on "phys_mapped_flash":
[2016-09-06 10:58:53] 0x000000000000-0x000000080000 : "boot0"
[2016-09-06 10:58:53] 0x000000080000-0x000000100000 : "boot1"
[2016-09-06 10:58:53] 0x000000300000-0x000000310000 : "eeprom"
[2016-09-06 10:58:53] Waiting 15sec before mounting root device...
[2016-09-06 10:58:54] usb 1-1: new high-speed USB device number 2 using OcteonUSB
[2016-09-06 10:58:54] usb-storage 1-1:1.0: USB Mass Storage device detected
[2016-09-06 10:58:54] scsi0 : usb-storage 1-1:1.0
[2016-09-06 10:58:55] scsi 0:0:0:0: Direct-Access USB DISK 2.0 PMAP PQ: 0 ANSI: 4
[2016-09-06 10:58:55] sd 0:0:0:0: [sda] 7579008 512-byte logical blocks: (3.88 GB/3.61 GiB)
[2016-09-06 10:58:55] sd 0:0:0:0: [sda] Write Protect is off
[2016-09-06 10:58:55] sd 0:0:0:0: [sda] No Caching mode page found
[2016-09-06 10:58:55] sd 0:0:0:0: [sda] Assuming drive cache: write through
[2016-09-06 10:58:55] sd 0:0:0:0: [sda] No Caching mode page found
[2016-09-06 10:58:55] sd 0:0:0:0: [sda] Assuming drive cache: write through
[2016-09-06 10:58:55] sda: sda1 sda2
[2016-09-06 10:58:55] sd 0:0:0:0: [sda] No Caching mode page found
[2016-09-06 10:58:55] sd 0:0:0:0: [sda] Assuming drive cache: write through
[2016-09-06 10:58:55] sd 0:0:0:0: [sda] Attached SCSI removable disk
[2016-09-06 10:59:09] JBD: Failed to read block at offset 3081
[2016-09-06 10:59:09] JBD: recovery failed
[2016-09-06 10:59:09] EXT3-fs (sda2): error loading journal
[2016-09-06 10:59:09] VFS: Cannot open root device "sda2" or unknown-block(8,2): error -17
[2016-09-06 10:59:09] Please append a correct "root=" boot option; here are the available partitions:
[2016-09-06 10:59:09] 1f00 512 mtdblock0 (driver?)
[2016-09-06 10:59:09] 1f01 512 mtdblock1 (driver?)
[2016-09-06 10:59:09] 1f02 64 mtdblock2 (driver?)
[2016-09-06 10:59:09] 0800 3789504 sda driver: sd
[2016-09-06 10:59:09] 0801 145408 sda1 14630b00-01
[2016-09-06 10:59:09] 0802 1709056 sda2 14630b00-02
[2016-09-06 10:59:09] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,2)
[2016-09-06 10:59:38]
[2016-09-06 10:59:38] *** NMI Watchdog interrupt on Core 0x00 ***
[2016-09-06 10:59:38] $0 0x0000000000000000 at 0x0000000010000ce0
[2016-09-06 10:59:38] v0 0xffffffffc0620000 v1 0x0000000000000000
[2016-09-06 10:59:38] a0 0xffffffffc07b0478 a1 0x0000000000000001
[2016-09-06 10:59:38] a2 0x0000000000000000 a3 0xffffffffc05f8028
[2016-09-06 10:59:38] a4 0x0000000000000000 a5 0x0000000000000002
[2016-09-06 10:59:38] a6 0x0000000000000002 a7 0x0000000000000000
[2016-09-06 10:59:38] t0 0xffffffffc07c0000 t1 0xffffffffc05f8028
[2016-09-06 10:59:38] t2 0xffffffffc07b0000 t3 0x0000000000000006
[2016-09-06 10:59:38] s0 0xffffffffc0590000 s1 0xffffffffc058bfd0
[2016-09-06 10:59:38] s2 0xffffffffc0590000 s3 0x0000000000000017
[2016-09-06 10:59:38] s4 0xffffffffc05df940 s5 0xffffffffc0688a60
[2016-09-06 10:59:38] s6 0x0000000000000004 s7 0x0000000000000001
[2016-09-06 10:59:38] t8 0x0000000000000000 t9 0x000000000000033a
[2016-09-06 10:59:38] k0 0xacf63bbbe8393060 k1 0x0e1f7e327e5cbfed
[2016-09-06 10:59:38] gp 0xffffffffc05dc000 sp 0xffffffffc05df6f0
[2016-09-06 10:59:38] s8 0x000000095160c1b4 ra 0xffffffffc04eaa38
[2016-09-06 10:59:38] err_epc 0xffffffffc00a1070 epc 0xffffffffc007a140
[2016-09-06 10:59:38] status 0x0000000010480ce4 cause 0x0000000000800800
[2016-09-06 10:59:38] sum0 0x000000f000000000 en0 0x0100000400000000
[2016-09-06 10:59:38] *** Chip soft reset soon ***