When I enter the command dmesg|grep -i sd，mke2fs /dev/sda1，it will show usb usb1-port1: unable to enumerate USB device in minicom.Look at the following.
U-Boot 2013.07 (ADI-2013R1)-00370-g7e333a2-dirty (Sep 13 2013 - 16:10:06), Build: jenkins-label=UBOOT_BF537-STAMP-53
CPU: ADSP bf537-0.2 (Detected Rev: 0.2) (bypass boot)
Board: ADI BF537 stamp board
Support: http://blackfin.uclinux.org/
Clock: VCO: 500 MHz, Core: 500 MHz, System: 125 MHz
RAM: 64 MiB
Flash: 4 MiB
MMC:
In: serial
Out: serial
Err: serial
KGDB: [on serial] ready
Net: bfin_mac
Hit any key to stop autoboot: 0
Using bfin_mac device
TFTP from server 10.100.4.174; our IP address is 10.100.4.50
Filename 'uImage'.
Load address: 0x1000000
Loading: #################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#####
6.6 MiB/s
done
Bytes transferred = 4831695 (49b9cf hex)
Image Name: bf537-0.2-4.0.0-ADI-2014R1-pre-0
Created: 2015-07-07 17:17:42 UTC
Image Type: Blackfin Linux Kernel Image (gzip compressed)
Data Size: 4831631 Bytes = 4.6 MiB
Load Address: 00001000
Entry Point: 0029bdb8
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
Starting Kernel at = 0029bdb8
Linux version 4.0.0-ADI-2014R1-pre-00479-g08c6a7d (test@54-7393-1362-sl811-jtap) (gcc version 4.3.5 (ADI-master/git-46c6a72) ) #4 We5
register early platform devices
bootconsole [early_shadow0] enabled
bootconsole [early_BFuart0] enabled
early printk enabled on early_BFuart0
Limiting kernel memory to 56MB due to anomaly 05000263
Board Memory: 64MB
Kernel Managed Memory: 64MB
Memory map:
fixedcode = 0x00000400-0x00000490
text = 0x00001000-0x001c2a20
rodata = 0x001c2a20-0x00262410
bss = 0x00263000-0x00277f3c
data = 0x00277f40-0x00294000
stack = 0x00292000-0x00294000
init = 0x00294000-0x005e0000
available = 0x005e0000-0x03800000
DMA Zone = 0x03f00000-0x04000000
Hardware Trace active and enabled
Boot Mode: 0
Reset caused by Software reset
Blackfin support (C) 2004-2010 Analog Devices, Inc.
Compiled for ADSP-BF537 Rev 0.2
Blackfin Linux support by http://blackfin.uclinux.org/
Processor Speed: 500 MHz core clock and 125 MHz System Clock
NOMPU: setting up cplb tables
Instruction Cache Enabled for CPU0
External memory: cacheable in instruction cache
Data Cache Enabled for CPU0
External memory: cacheable (write-back) in data cache
Built 1 zonelists in Zone order, mobility grouping off. Total pages: 14224
Kernel command line: root=/dev/mtdblock0 rw clkin_hz=25000000 earlyprintk=serial,uart0,57600 console=ttyBF0,57600 ip=10.100.4.50:10.f
PID hash table entries: 256 (order: -2, 1024 bytes)
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 50720K/57344K available (1798K kernel code, 112K rwdata, 638K rodata, 3376K init, 83K bss, 6624K reserved, 0K cma-reserved, )
NR_IRQS:146
Configuring Blackfin Priority Driven Interrupts
Calibrating delay loop... 995.32 BogoMIPS (lpj=1990656)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
devtmpfs: initialized
Blackfin Scratchpad data SRAM: 4 KB
Blackfin L1 Data A SRAM: 16 KB (16 KB free)
Blackfin L1 Data B SRAM: 16 KB (16 KB free)
Blackfin L1 Instruction SRAM: 48 KB (32 KB free)
NET: Registered protocol family 16
Blackfin DMA Controller
stamp_init(): registering device resources
SCSI subsystem initialized
bfin-spi bfin-spi.0: master is unqueued, this is deprecated
bfin-spi bfin-spi.0: Blackfin on-chip SPI Controller Driver, Version 1.0, regs@ffc00500, dma channel@7
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
Switched to clocksource bfin_cs_cycles
NET: Registered protocol family 2
TCP established hash table entries: 1024 (order: 0, 4096 bytes)
TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
TCP: Hash tables configured (established 1024 bind 1024)
TCP: reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
debug-mmrs: setting up Blackfin MMR debugfs
io scheduler noop registered (default)
bfin-uart: Blackfin serial driver
bfin-uart.0: ttyBF0 at MMIO 0xffc00400 (irq = 18, base_baud = 7812500) is a BFIN-UART
console [ttyBF0] enabled
console [ttyBF0] enabled
bootconsole [early_BFuart0] disabled
bootconsole [early_BFuart0] disabled
bootconsole [early_shadow0] disabled
brd: module loaded
m25p80 spi0.1: unrecognized JEDEC id bytes: ff, ff, ff
libphy: bfin_mii_bus: probed
bfin_mac: attached PHY driver [Generic PHY] (mii_bus:phy_addr=bfin_mii_bus-0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=24)@sclk=125MHz)
bfin_mac bfin_mac.0 eth0: Blackfin on-chip Ethernet MAC driver, Version 1.1
isp1362-hcd isp1362-hcd.0: ISP1362 Host Controller
isp1362-hcd isp1362-hcd.0: new USB bus registered, assigned bus number 1
isp1362-hcd isp1362-hcd.0: irq 53, io mem 0x20360000
isp1362-hcd isp1362-hcd.0: ISP1362 Memory usage:
isp1362-hcd isp1362-hcd.0: ISTL: 2 * 256: 512 @ $0000:$0100
isp1362-hcd isp1362-hcd.0: INTL: 16 * ( 64+8): 1152 @ $0200
isp1362-hcd isp1362-hcd.0: ATL : 32 * ( 64+8): 2304 @ $0680
isp1362-hcd isp1362-hcd.0: USED/FREE: 3968 128
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
isp1362-hcd isp1362-hcd.0: ISP1362 Host Controller, irq 53
sl811-hcd sl811-hcd.0: SL811HS v1.5
sl811-hcd sl811-hcd.0: new USB bus registered, assigned bus number 2
sl811-hcd sl811-hcd.0: irq 54, io mem 0x20340000
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
usbcore: registered new interface driver usb-storage
rtc (null): invalid alarm value: 1900-1-18 0:0:0
rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0
bfin_wdt: initialized: timeout=20 sec (nowayout=0)
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
TCP: cubic registered
NET: Registered protocol family 17
rtc-bfin rtc-bfin: setting system clock to 1970-01-17 06:44:50 UTC (1406690)
usb 1-2: new full-speed USB device number 2 using isp1362-hcd
IP-Config: Complete:
device=eth0, hwaddr=00:e0:22:fe:47:c0, ipaddr=10.100.4.50, mask=255.255.255.0, gw=10.100.4.174
host=bf537-stamp, domain=, nis-domain=(none)
bootserver=10.100.4.174, rootserver=10.100.4.174, rootpath=
dma_alloc_init: dma_page @ 0x02891000 - 256 pages at 0x03f00000
Freeing unused kernel memory: 3376K (00294000 - 005e0000)
usb-storage 1-2:1.0: USB Mass Storage device detected
scsi host0: usb-storage 1-2:1.0
scsi 0:0:0:0: Direct-Access Kingston DataTraveler 2.0 1.00 PQ: 0 ANSI: 2
sd 0:0:0:0: [sda] 1952768 512-byte logical blocks: (999 MB/953 MiB)
BusyBox v1.23.1 (2015-07-07 23:40:47 CST) hush - the humble shell
sd 0:0:0:0: [sda] Write Protect is off
root:/> bfin_mac bfin_mac.0 eth0: Link is Up - 100Mbps/Full - flow control off
sd 0:0:0:0: [sda] No Caching mode page found
sd 0:0:0:0: [sda] Assuming drive cache: write through
sda: sda1 sda2
sd 0:0:0:0: [sda] Attached SCSI removable disk
random: nonblocking pool is initialized
root:/> dmesg|grep -i sd
sd 0:0:0:0: [sda] 1952768 512-byte logical blocks: (999 MB/953 MiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 23 00 00 00
sd 0:0:0:0: [sda] No Caching mode page found
sd 0:0:0:0: [sda] Assuming drive cache: write through
sda: sda1 sda2
sd 0:0:0:0: [sda] Attached SCSI removable disk
root:/> mke2fs /dev/sda1
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
122400 inodes, 488157 blocks
24407 blocks (5%) reserved for the super user
First data block=1
Maximum filesystem blocks=524288
60 block groups
8192 blocks per group, 8192 fragments per group
2040 inodes per group
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409
root:/> usb 1-1: device descriptor read/64, error -110
usb 1-1: device descriptor read/64, error -110
usb 1-1: new full-speed USB device number 3 using sl811-hcd
usb 1-1: device descriptor read/64, error -110
usb 1-1: device descriptor read/64, error -110
usb 1-1: new full-speed USB device number 4 using sl811-hcd
usb 1-1: device descriptor read/8, error -110
usb 1-1: device descriptor read/8, error -110
usb 1-1: new full-speed USB device number 5 using sl811-hcd
usb 1-1: device descriptor read/8, error -110
usb 1-1: device descriptor read/8, error -110
usb usb1-port1: unable to enumerate USB device
usb 1-1: device descriptor read/64, error -110
usb 1-1: device descriptor read/64, error -110
usb 1-1: new full-speed USB device number 3 using sl811-hcd
usb 1-1: device descriptor read/64, error -110
usb 1-1: device descriptor read/64, error -110
usb 1-1: new full-speed USB device number 4 using sl811-hcd
usb 1-1: device descriptor read/8, error -110
usb 1-1: device descriptor read/8, error -110
usb 1-1: new full-speed USB device number 5 using sl811-hcd
usb 1-1: device descriptor read/8, error -110
usb 1-1: device descriptor read/8, error -110
usb usb1-port1: unable to enumerate USB device
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