USB Recovery Failure (Reposting)

Thanks for the hint of where to begin - Indeed after slogging through the output of dmesg (full output included below), here's what I found (abbreviated and highlighted flash init in red):

So I assume that's the root-cause and that replacement of the flash is in order (if possible)?

Thanks for any additional guidance you can provide.

--- Apparently - the forum doesn't permit attachment of text files (this is not helpful) 

Initializing cgroup subsys cpu
Linux version 3.0.101.RN_ARM.4 (jenkins@blocks) (gcc version 4.6.4 (Linaro GCC branch-4.6.4. Marvell GCC Dev 201310-2126.3d181f66 64K MAXPAGESIZE ALIGN) ) #1 Wed Apr 1 16:06:27 PDT 2015
CPU: Marvell PJ4Bv7 Processor [561f5811] revision 1 (ARMv7), cr=10c53c7d
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: Marvell Armada-370
[... Kernel Init Messages Removed]
Unpacking initramfs...
Freeing initrd memory: 2664K
PMU: registered new PMU device of type 0
Todo: mknod /dev/buttons c 253 0
WARNING: cooling threshold was triggered
Armada XP hwmon thermal sensor initialized.
futex hash table entries: 256 (order: -1, 3072 bytes)
VFS: Disk quotas dquot_6.5.2
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
fuse init (API version 7.16)
SGI XFS with ACLs, security attributes, large block/inode numbers, no debug enabled
SGI XFS Quota Management subsystem
Btrfs loaded
msgmni has been set to 247
async_tx: api initialized (async)
io scheduler noop registered
io scheduler deadline registered (default)
io scheduler cfq registered
mv_xor_shared mv_xor_shared.0: Marvell shared XOR driver
mv_xor_shared mv_xor_shared.1: Marvell shared XOR driver
mv_xor mv_xor.0: Marvell XOR: ( crc32c )
mv_xor mv_xor.1: Marvell XOR: ( xor )
mv_xor mv_xor.2: Marvell XOR: ( cpy )
mv_xor mv_xor.3: Marvell XOR: ( fill cpy )
Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled
serial8250.0: ttyS0 at MMIO 0xd0012000 (irq = 41) is a 16550A
console [ttyS0] enabled
loop: module loaded
ahci 0000:00:01.0: version 3.0
PCI: enabling device 0000:00:01.0 (0146 -> 0147)
ahci 0000:00:01.0: AHCI 0001.0000 32 slots 2 ports 6 Gbps 0x3 impl SATA mode
ahci 0000:00:01.0: flags: 64bit ncq sntf led only pmp fbs pio slum part sxs
scsi0 : ahci
scsi1 : ahci
ata1: SATA max UDMA/133 abar m512@0xe0010000 port 0xe0010100 irq 224
ata2: SATA max UDMA/133 abar m512@0xe0010000 port 0xe0010180 irq 224
sata_mv sata_mv.0: version 1.28
sata_mv sata_mv.0: slots 32 ports 2
scsi2 : sata_mv
scsi3 : sata_mv
ata3: SATA max UDMA/133 irq 55
ata4: SATA max UDMA/133 irq 55
Rounding down aligned max_sectors from 4294967295 to 4294967288
mvSFlashInit ERROR: Unknown SPI flash device!
ERROR: sflash_probe - Failed to initialize the SFlash.
armada-nand armada-nand.0: Initialize HAL based NFC in 8bit mode with DMA Disabled using BCH 4bit ECC
armada-nand armada-nand.0: mvNfcInit() failed.
mv_eth_probe: port_mask=0x3, cpu_mask=0x1
0 - Base 0x00000000 , Size = 0x20000000.
4 - Base 0xf2000000 , Size = 0x02000000.
8 - Base 0xe0000000 , Size = 0x02000000.
9 - Base 0xf1100000 , Size = 0x00100000.
10 - Base 0xe2000000 , Size = 0x02000000.
11 - Base 0xf1200000 , Size = 0x00100000.
12 - Base 0xd0000000 , Size = 0x00100000.
14 - Base 0xf0000000 , Size = 0x01000000.
23 - Base 0xf5000000 , Size = 0x01000000.
25 - Base 0xc8010000 , Size = 0x00010000.
o 2 Giga ports supported
o SKB recycle supported (Enabled)
o NETA acceleration mode 1
o RX Queue support: 8 Queues * 512 Descriptors
o TX Queue support: 8 Queues * 512 Descriptors
o GSO supported
o GRO supported
o Receive checksum offload supported
o Transmit checksum offload supported
o Driver ERROR statistics enabled

o Loading network interface(s)

o Warning: GbE port 0 is powered off

o Port 1 is connected to Linux netdevice
giga p=1: mtu=1500, mac=d002be44
o eth0, ifindex = 2, GbE port = 1

bonding: Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
sky2: driver version 1.28
tun: Universal TUN/TAP device driver, 1.6
tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci_marvell ehci_marvell.0: Marvell Orion EHCI
ehci_marvell ehci_marvell.0: new USB bus registered, assigned bus number 1
ehci_marvell ehci_marvell.0: irq 45, io base 0xfbb50100
ehci_marvell ehci_marvell.0: USB 2.0 started, EHCI 1.00
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
ehci_marvell ehci_marvell.1: Marvell Orion EHCI
ehci_marvell ehci_marvell.1: new USB bus registered, assigned bus number 2
ehci_marvell ehci_marvell.1: irq 46, io base 0xfbb51100
ehci_marvell ehci_marvell.1: USB 2.0 started, EHCI 1.00
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
xhci_hcd 0000:01:01.0: xHCI Host Controller
xhci_hcd 0000:01:01.0: new USB bus registered, assigned bus number 3
Fresco Logic Linux Patch : 20
ata3: SATA link down (SStatus 0 SControl F300)
xHCI xhci_add_endpoint called for root hub
xHCI xhci_check_bandwidth called for root hub
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
xhci_hcd 0000:01:01.0: xHCI Host Controller
xhci_hcd 0000:01:01.0: new USB bus registered, assigned bus number 4
xHCI xhci_add_endpoint called for root hub
xHCI xhci_check_bandwidth called for root hub
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
usbcore: registered new interface driver usblp
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
usbcore: registered new interface driver ums-datafab
usbcore: registered new interface driver ums-freecom
usbcore: registered new interface driver ums-jumpshot
usbcore: registered new interface driver ums-sddr09
usbcore: registered new interface driver ums-sddr55
i2c /dev entries driver
usb 1-1: new high-speed USB device number 2 using ehci_marvell
rtc-isl12057 0-0068: chip found, driver version 0.1
rtc (null): invalid alarm value: 1900-1-3 0:0:0
rtc-isl12057 0-0068: rtc core: registered rtc-isl12057 as rtc0
rtc-isl12057 0-0068: rtc power failure detected, please set clock.
ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
ata2.00: ATA-9: WDC WD40EFRX-68WT0N0, 82.00A82, max UDMA/133
ata2.00: 7814037168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
ata1.00: ATA-9: WDC WD40EFRX-68WT0N0, 82.00A82, max UDMA/133
ata1.00: 7814037168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
ata2.00: configured for UDMA/133
ata1.00: configured for UDMA/133
scsi 0:0:0:0: Direct-Access ATA WDC WD40EFRX-68W 82.0 PQ: 0 ANSI: 5
md: raid0 personality registered for level 0
md: raid1 personality registered for level 1
md: raid10 personality registered for level 10
md: raid6 personality registered for level 6
md: raid5 personality registered for level 5
md: raid4 personality registered for level 4
device-mapper: ioctl: 4.23.0-ioctl (2012-07-25) initialised: dm-devel@redhat.com
sd 0:0:0:0: [sda] 7814037168 512-byte logical blocks: (4.00 TB/3.63 TiB)
sd 0:0:0:0: [sda] 4096-byte physical blocks
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
scsi 1:0:0:0: Direct-Access ATA WDC WD40EFRX-68W 82.0 PQ: 0 ANSI: 5
sd 1:0:0:0: [sdb] 7814037168 512-byte logical blocks: (4.00 TB/3.63 TiB)
sd 1:0:0:0: [sdb] 4096-byte physical blocks
sd 1:0:0:0: [sdb] Write Protect is off
sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00
sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Registered led device: backup
Registered led device: SATA1_PRESENT
Registered led device: SATA2_PRESENT
Registered led device: power
sda: sda1 sda2 sda3
sd 0:0:0:0: [sda] Attached SCSI disk
sdb: sdb1 sdb2 sdb3
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
IPv4 over IPv4 tunneling driver
sd 1:0:0:0: [sdb] Attached SCSI disk
ip_tables: (C) 2000-2006 Netfilter Core Team
TCP cubic registered
NET: Registered protocol family 10
ip6_tables: (C) 2000-2006 Netfilter Core Team
NET: Registered protocol family 17
802.1Q VLAN Support v1.8
Registering the dns_resolver key type
VFP support v0.3: implementor 56 architecture 2 part 20 variant 9 rev 6
HDD_pwrctl_init
SATA1 is detected.
SATA2 is detected.
Request the irq HDDpwrctrl success.
usb-storage 1-1:1.0: Quirks match for vid 090c pid 1000: 80000
scsi4 : usb-storage 1-1:1.0
registered taskstats version 1
rtc-isl12057 0-0068: setting system clock to 2000-01-03 21:50:53 UTC (946936253)
ata4: SATA link down (SStatus 0 SControl F300)
Freeing init memory: 164K
scsi 4:0:0:0: Direct-Access USB Flash Disk 1100 PQ: 0 ANSI: 4
sd 4:0:0:0: [sdc] 15663104 512-byte logical blocks: (8.01 GB/7.46 GiB)
sd 4:0:0:0: [sdc] Write Protect is off
sd 4:0:0:0: [sdc] Mode Sense: 43 00 00 00
sd 4:0:0:0: [sdc] No Caching mode page found
sd 4:0:0:0: [sdc] Assuming drive cache: write through
sd 4:0:0:0: [sdc] No Caching mode page found
sd 4:0:0:0: [sdc] Assuming drive cache: write through
sdc: sdc1
sd 4:0:0:0: [sdc] No Caching mode page found
sd 4:0:0:0: [sdc] Assuming drive cache: write through
sd 4:0:0:0: [sdc] Attached SCSI removable disk
pool #1: pkt_size=1536, buf_size=1632 - 8192 of 8192 buffers added
eth0: link up
eth0: started
eth0: no IPv6 routers present