FAQ: [#6606] kernel config with nand would fail to boot on bf548-ezkit(2011)

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[#6606] kernel config with nand would fail to boot on bf548-ezkit

Submitted By: Mingquan Pan

Open Date

2011-05-18 03:17:48     Close Date

2011-06-02 04:16:01

Priority:

Medium     Assignee:

steven miao

Status:

Closed     Fixed In Release:

N/A

Found In Release:

2011R1     Release:

Category:

N/A     Board:

N/A

Processor:

ALL     Silicon Revision:

Is this bug repeatable?:

Yes     Resolution:

Fixed

Uboot version or rev.:

    Toolchain version or rev.:

5013

App binary format:

N/A     

Summary: kernel config with nand would fail to boot on bf548-ezkit

Details:

 

kernel config with nand would fail to boot on bf548-ezkit from April 20.

 

bfin> bootm

## Booting kernel from Legacy Image at 02000000 ...

   Image Name:   bf548-0.2-2.6.39-rc4-ADI-2011R1-

   Created:      2011-04-21   1:46:51 UTC

   Image Type:   Blackfin Linux Kernel Image (gzip compressed)

   Data Size:    10398844 Bytes = 9.9 MiB

   Load Address: 00001000

   Entry Point:  002c5dd8

   Verifying Checksum ... OK

   Uncompressing Kernel Image ... OK

Starting Kernel at = 002c5dd8

Linux version 2.6.39-rc4-ADI-2011R1-pre-svn9863 (test@uclinux61-bf548-std) (gcc version 4.3.5 (ADI-trunk/svn-5013) ) #342 Thu Apr 21 09:46:43 CST 2011

register early platform devices

bootconsole [early_shadow0] enabled

bootconsole [early_BFuart1] enabled

early printk enabled on early_BFuart1

Board Memory: 64MB

Kernel Managed Memory: 64MB

Memory map:

  fixedcode = 0x00000400-0x00000490

  text      = 0x00001000-0x001e62f8

  rodata    = 0x001e62f8-0x00287a7c

  bss       = 0x00288000-0x0029b8a8

  data      = 0x0029b8a8-0x002bc000

    stack   = 0x002ba000-0x002bc000

  init      = 0x002bc000-0x01175000

  available = 0x01175000-0x03e00000

  DMA Zone  = 0x03e00000-0x04000000

Hardware Trace active and enabled

Boot Mode: 1

Reset caused by Software reset

Blackfin support (C) 2004-2010 Analog Devices, Inc.

Compiled for ADSP-BF548 Rev 0.2

Blackfin Linux support by http://blackfin.uclinux.org/

Processor Speed: 525 MHz core clock and 131 MHz System Clock

NOMPU: setting up cplb tables

Instruction Cache Enabled for CPU0

  External memory: cacheable in instruction cache

  L2 SRAM        : uncacheable in instruction cache

Data Cache Enabled for CPU0

  External memory: cacheable (write-through) in data cache

  L2 SRAM        : uncacheable in data cache

Built 1 zonelists in Zone order, mobility grouping off.  Total pages: 15748

Kernel command line: root=/dev/mtdblock0 rw ip=10.100.4.50 earlyprintk=serial,uart1,57600 console=ttyBF1,57600 ip=10.100.4.50:10.100.4.174:10.100.4.174:255.255.255.0:bf548-ezkit:eth0:off

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 available: 45004k/65536k RAM, (15076k init code, 1940k kernel code, 856k data, 2048k dma, 612k reserved)

NR_IRQS:295

Configuring Blackfin Priority Driven Interrupts

console [ttyBF1] enabled, bootconsole disabled

console [ttyBF1] enabled, bootconsole disabled

Calibrating delay loop... 1044.48 BogoMIPS (lpj=2088960)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

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 (41 KB free)

Blackfin L2 SRAM: 128 KB (128 KB free)

NET: Registered protocol family 16

Blackfin DMA Controller

ezkit_init(): registering device resources

bio: create slab <bio-0> at 0

Data access CPLB miss

<5> - Used by the MMU to signal a CPLB miss on a data access.

Kernel OOPS in progress

Deferred Exception context

CURRENT PROCESS:

COMM=swapper PID=1  CPU=0

invalid mm

return address: [0x000470dc]; contents of:

0x000470b0:  a102  a1d8  0982  1c03  2055  300b  3019  67fb

0x000470c0:  0c3b  1817  0000  0000  640a  ad42  a118  9169

0x000470d0:  b102  304a  40c8  a0c1  5041  5e90 [a1d0] b140

0x000470e0:  5e8d  b111  6c09  9369  a102  a1d8  0982  1fe6

 

ADSP-BF548-0.2 525(MHz CCLK) 131(MHz SCLK) (mpu off)

Linux version 2.6.39-rc4-ADI-2011R1-pre-svn9863 (test@uclinux61-bf548-std) (gcc version 4.3.5 (ADI-trunk/svn-5013) ) #342 Thu Apr 21 09:46:43 CST 2011

 

SEQUENCER STATUS:               Not tainted

SEQSTAT: 00002026  IPEND: 8008  IMASK: 003f  SYSCFG: 0006

  Peripheral interrupts masked off

  Kernel interrupts masked off

  EXCAUSE   : 0x26

  physical IVG3 asserted : <0xffa00780> { _trap + 0x0 }

  physical IVG15 asserted : <0xffa00fc8> { _evt_system_call + 0x0 }

  logical irq   6 mapped  : <0xffa003bc> { _bfin_coretmr_interrupt + 0x0 }

RETE: <0x00000000> /* Maybe null pointer? */

RETN: <0x0201bec0> /* kernel dynamic memory (maybe user-space) */

RETX: <0x00000480> /* Maybe fixed code section */

RETS: <0x00047572> { _kmem_cache_alloc + 0x72 }

PC  : <0x000470dc> { _cache_alloc_refill + 0xd8 }

DCPLB_FAULT_ADDR: <0x497ca8cc> /* reserved memory */

ICPLB_FAULT_ADDR: <0x000470dc> { _cache_alloc_refill + 0xd8 }

PROCESSOR STATE:

R0 : 77c7c080    R1 : 79c7ed30    R2 : 00000002    R3 : 0000003a

R4 : 00000000    R5 : 00100100    R6 : 00000001    R7 : 02002ca8

P0 : 02002ca8    P1 : 00000001    P2 : 497ca8b0    P3 : 02000120

P4 : 02002ca0    P5 : 0200a800    FP : 02002cb0    SP : 0201bde4

LB0: ffa01798    LT0: ffa01792    LC0: 00000000

LB1: 0004729c    LT1: 00047296    LC1: 00000000

B0 : 00000000    L0 : 00000000    M0 : 0000002c    I0 : 00200200

B1 : 00000000    L1 : 00000000    M1 : 00000000    I1 : 00000000

B2 : 00000000    L2 : 00000000    M2 : 00000000    I2 : 00000000

B3 : 00000000    L3 : 00000000    M3 : 00000000    I3 : 00000000

A0.w: 00211d76   A0.x: 00000000   A1.w: 0000078c   A1.x: 00000000

USP : 00000000  ASTAT: 02002040

 

Hardware Trace:

   0 Target : <0x0000400c> { _trap_c + 0x0 }

     Source : <0xffa00714> { _exception_to_level5 + 0xa4 } JUMP.L

   1 Target : <0xffa00670> { _exception_to_level5 + 0x0 }

     Source : <0xffa00524> { _bfin_return_from_exception + 0x18 } RTX

   2 Target : <0xffa0050c> { _bfin_return_from_exception + 0x0 }

     Source : <0xffa005c8> { _ex_trap_c + 0x74 } JUMP.S

   3 Target : <0xffa00438> { _ex_dcplb_miss + 0x0 }

     Source : <0xffa007da> { _trap + 0x5a } JUMP (P4)

   4 Target : <0xffa00780> { _trap + 0x0 }

      FAULT : <0x000470dc> { _cache_alloc_refill + 0xd8 } P0 = W[P2 + 7]

     Source : <0x000470da> { _cache_alloc_refill + 0xd6 } 0x5e90

   5 Target : <0x000470ba> { _cache_alloc_refill + 0xb6 }

     Source : <0x000470ee> { _cache_alloc_refill + 0xea } IF CC JUMP pcrel (BP)

   6 Target : <0x000470bc> { _cache_alloc_refill + 0xb8 }

     Source : <0x00047160> { _cache_alloc_refill + 0x15c } IF CC JUMP pcrel (BP)

   7 Target : <0x0004714c> { _cache_alloc_refill + 0x148 }

     Source : <0x000470a8> { _cache_alloc_refill + 0xa4 } IF CC JUMP pcrel

   8 Target : <0x00047086> { _cache_alloc_refill + 0x82 }

     Source : <0x0004706e> { _cache_alloc_refill + 0x6a } IF CC JUMP pcrel

   9 Target : <0x0004706a> { _cache_alloc_refill + 0x66 }

     Source : <0x00047066> { _cache_alloc_refill + 0x62 } IF !CC JUMP pcrel (BP)

  10 Target : <0x00047064> { _cache_alloc_refill + 0x60 }

     Source : <0x00047060> { _cache_alloc_refill + 0x5c } IF CC JUMP pcrel (BP)

  11 Target : <0x00047004> { _cache_alloc_refill + 0x0 }

     Source : <0x0004756e> { _kmem_cache_alloc + 0x6e } CALL pcrel

  12 Target : <0x0004756a> { _kmem_cache_alloc + 0x6a }

     Source : <0x00047528> { _kmem_cache_alloc + 0x28 } IF CC JUMP pcrel

  13 Target : <0x0004751c> { _kmem_cache_alloc + 0x1c }

     Source : <0x0004757a> { _kmem_cache_alloc + 0x7a } JUMP.S

  14 Target : <0x0004757a> { _kmem_cache_alloc + 0x7a }

     Source : <0x001e5040> { __cond_resched + 0x20 } RTS

  15 Target : <0x001e503a> { __cond_resched + 0x1a }

     Source : <0x001e5032> { __cond_resched + 0x12 } IF CC JUMP pcrel (BP)

Kernel Stack

Stack info:

SP: [0x0201bdb4] <0x0201bdb4> /* kernel dynamic memory (maybe user-space) */

FP: (0x0201bfe0)

Memory from 0x0201bdb0 to 0201c000

0201bdb0: 00000001 [00000001] 0004720c  00000000  ffa00718  0028a000  00008008  00002026

0201bdd0: 00100100  00000000  0000000c  00000000  00000480  00000480  00008008  00002026

0201bdf0: 00000000  0201bec0  00000480  000470dc  00047572  77c7c080  02002040  0004729c

0201be10: ffa01798  00047296  ffa01792  00000000  00000000  0000078c  00000000  00211d76

0201be30: 00000000  00000000  00000000  00000000  00000000  00000000  00000000  00000000

0201be50: 00000000  00000000  00000000  00000000  0000002c  00000000  00000000  00000000

0201be70: 00200200  00000000  02002cb0  0200a800  02002ca0  02000120  497ca8b0  00000001

0201be90: 02002ca8  02002ca8  00000001  00100100  00000000  0000003a  00000002  79c7ed30

0201beb0: 77c7c080  77c7c080  02002ca8  00000006  ffffffff  00000000  0026341a  00000000

0201bed0: 000000d0  0004793a  00000010  000000d0  010000d0  00000000  00047572  02000120

0201bef0: 00000000  00288010  00000001  000000d0  0000ffff  00000000  00047d22  000000d0

0201bf10: 0206a620  00105936  0206a620  00000001  0024f370  0024f720  001055cc  002ab0e4

0201bf30: 00000000  0024f718  00000001  002cdb46  002db704  00000000  00000000  00000000

0201bf50: 00000000  00237200  ffffffff  002cd9a8  0024e964  00000000  00000240  00000000

0201bf70: 00000000  002cd8e6  002de4a8  002cd8c8  00000000  00000000  00000000  00000000

0201bf90: 0024d178  001f8810 <0000110a><0000110a> 00000000  00000000  002a0000  00035374

0201bfb0: 002a0480  002d0000  002bc170  002de4a8  002de728  002de400  00000000  00000000

0201bfd0: 00000000  00000000  00000000  00000000 (00000000)

00000000  00000000

0201bff0: 00000000  00000000  ffffffff  00000006

Return addresses in stack:

    address : <0x0000110a> { _do_one_initcall + 0x10a }

    address : <0x0000110a> { _do_one_initcall + 0x10a }

   frame  1 : <0x00001556> { _kernel_thread_helper + 0x6 }

Modules linked in:

Kernel panic - not kernel panic detected... trying to recover from it

 

 

last passed version:

root:/> ^[[6nversion^M

kernel:    Linux release 2.6.38.3-ADI-2011R1-pre-svn9857, build #336 Tue Apr 19 19:08:35 CST 2011^M

toolchain: bfin-uclinux-gcc release gcc version 4.3.5 (ADI-trunk/svn-5013) ^M

user-dist: release svn-10142, build #5466 Tue Apr 19 19:07:05 CST 2011^M

root:/> ^[[6nsuccessful boot attempt

 

Follow-ups

 

--- steven miao                                              2011-05-26 06:38:17

this crash is same as #6607

 

--- steven miao                                              2011-06-01 04:15:31

same fix as #6607

 

--- Mingquan Pan                                             2011-06-02 04:23:47

Yes, the kernel config with nand can boot now.

 

Linux version 2.6.39-ADI-2011R1-pre-svn9919 (test@uclinux61-bf548-std) (gcc

version 4.3.5 (ADI-trunk/svn-5013) ) #518 Thu Jun 2 15:35:44 CST 2011

register early platform devices

bootconsole [early_shadow0] enabled

bootconsole [early_BFuart1] enabled

early printk enabled on early_BFuart1

Board Memory: 64MB

Kernel Managed Memory: 64MB

Memory map:

  fixedcode = 0x00000400-0x00000490

  text      = 0x00001000-0x00216f08

  rodata    = 0x00216f08-0x002c5660

  bss       = 0x002c6000-0x002d99b4

  data      = 0x002d99b4-0x002fa000

    stack   = 0x002f8000-0x002fa000

  init      = 0x002fa000-0x00b3b000

  available = 0x00b3b000-0x03e00000

  DMA Zone  = 0x03e00000-0x04000000

Hardware Trace active and enabled

Boot Mode: 1

Reset caused by Software reset

Blackfin support (C) 2004-2010 Analog Devices, Inc.

Compiled for ADSP-BF548 Rev 0.2

Blackfin Linux support by http://blackfin.uclinux.org/

Processor Speed: 525 MHz core clock and 131 MHz System Clock

boot memmap: 0000000000b3b000 - 0000000003e00000 (usable)

On node 0 totalpages: 15872

free_area_init_node: node 0, pgdat 002f6b18, node_mem_map 00b3d000

  DMA zone: 124 pages used for memmap

  DMA zone: 0 pages reserved

  DMA zone: 15748 pages, LIFO batch:0

NOMPU: setting up cplb tables

Instruction Cache Enabled for CPU0

  External memory: cacheable in instruction cache

  L2 SRAM        : uncacheable in instruction cache

Data Cache Enabled for CPU0

  External memory: cacheable (write-through) in data cache

  L2 SRAM        : uncacheable in data cache

pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768

pcpu-alloc: [0] 0

Built 1 zonelists in Zone order, mobility grouping off.  Total pages: 15748

Kernel command line: root=/dev/mtdblock0 rw ip=10.100.4.50

earlyprintk=serial,uart1,57600 console=ttyBF1,57600

ip=10.100.4.50:10.100.4.174:10.100.4.174:255.255.255.0:bf548-ezkit:eth0:off

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)

Kernel managed physical pages: 15872

Memory available: 51380k/65536k RAM, (8452k init code, 2135k kernel code, 909k

data, 2048k dma, 612k reserved)

NR_IRQS:295

Configuring Blackfin Priority Driven Interrupts

console [ttyBF1] enabled, bootconsole disabled

Calibrating delay loop... 1044.48 BogoMIPS (lpj=2088960)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

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 (41 KB free)

Blackfin L2 SRAM: 128 KB (128 KB free)

NET: Registered protocol family 16

Blackfin DMA Controller

ezkit_init(): registering device resources

bio: create slab <bio-0> at 0

SCSI subsystem initialized

libata version 3.00 loaded.

spi spi0.2: Warning: SPI CPHA not set: Slave Select not under software

control!

See Documentation/blackfin/bfin-spi-notes.txt

bfin-spi bfin-spi.0: Blackfin on-chip SPI Controller Driver, Version 1.0,

regs_base@ffc00500, dma channel@4

bfin-spi bfin-spi.1: Blackfin on-chip SPI Controller Driver, Version 1.0,

regs_base@ffc02300, dma channel@5

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

i2c-bfin-twi i2c-bfin-twi.0: Blackfin BF5xx on-chip I2C TWI Contoller,

regs_base@ffc00700

i2c-bfin-twi i2c-bfin-twi.1: Blackfin BF5xx on-chip I2C TWI Contoller,

regs_base@ffc02200

Advanced Linux Sound Architecture Driver Version 1.0.24.

cfg80211: Calling CRDA to update world regulatory domain

musb-hdrc: version 6.0, musb-dma, host, debug=0

musb-hdrc: ConfigData=0x00 (UTMI-8)

musb-hdrc: HDRC RTL version 1.900

musb-hdrc musb-hdrc: MUSB HDRC host driver

musb-hdrc musb-hdrc: new USB bus registered, assigned bus number 1

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 1 port detected

musb-hdrc musb-hdrc: USB Host mode controller at ffc03c00 using DMA, IRQ 82

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

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

msgmni has been set to 100

io scheduler noop registered (default)

bf54x-lq043: FrameBuffer initializing...

dma_alloc_init: dma_page @ 0x02af2000 - 512 pages at 0x03e00000

bfin-uart: Blackfin serial driver

bfin-uart.1: ttyBF1 at MMIO 0xffc02000 (irq = 48) is a BFIN-UART

bfin-otp: initialized

brd: module loaded

register bfin atapi driver

scsi0 : pata-bf54x

ata1: PATA max UDMA/66 irq 68

physmap platform flash device: 02000000 at 20000000

physmap-flash.0: Found 1 x16 devices at 0x0 in 16-bit bank. Manufacturer ID

0x000089 Chip ID 0x00881e

physmap-flash.0: Found an alias at 0x1000000 for the chip at 0x0

Intel/Sharp Extended Query Table at 0x010A

Intel/Sharp Extended Query Table at 0x010A

Intel/Sharp Extended Query Table at 0x010A

Intel/Sharp Extended Query Table at 0x010A

Intel/Sharp Extended Query Table at 0x010A

Using buffer write method

Using auto-unlock on power-up/resume

cfi_cmdset_0001: Erase suspend on write enabled

erase region 0: offset=0x0,size=0x20000,blocks=127

erase region 1: offset=0xfe0000,size=0x8000,blocks=4

RedBoot partition parsing not available

Using physmap partition information

Creating 5 MTD partitions on "physmap-flash.0":

0x000000000000-0x000000080000 : "bootloader(nor)"

0x000000080000-0x000000480000 : "linux kernel(nor)"

0x000000480000-0x000000fe0000 : "file system(nor)"

0x000000fe0000-0x000000ff8000 : "config(nor)"

0x000000ff8000-0x000001000000 : "u-boot env(nor)"

bfin-spi bfin-spi.0: transfer: unsupported bits_per_word

m25p80: probe of spi0.1 failed with error -22

BF5xx on-chip NAND FLash Controller Driver, Version 1.2 (c) 2007 Analog

Devices, Inc.

bf5xx-nand bf5xx-nand.0: data_width=8, wr_dly=3, rd_dly=3

NAND device: Manufacturer ID: 0x20, Chip ID: 0xda (ST Micro NAND 256MiB 3,3V

8-bit)

Creating 3 MTD partitions on "NAND 256MiB 3,3V 8-bit":

0x000000000000-0x000000080000 : "bootloader(nand)"

0x000000080000-0x000000480000 : "linux kernel(nand)"

0x000000480000-0x000010000000 : "file system(nand)"

smsc911x: Driver version 2008-10-21.

smsc911x smsc911x.0: eth0: Features changed: 0x00004800 -> 0x00004000

smsc911x-mdio: probed

eth0: attached PHY driver [Generic PHY] (mii_bus:phy_addr=0:01, irq=-1)

net eth0: MAC Address: 00:e0:22:fe:bf:4e

Initializing USB Mass Storage driver...

usbcore: registered new interface driver usb-storage

USB Mass Storage support registered.

input: bf54x-keys as /devices/platform/bf54x-keys/input/input0

rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0

i2c /dev entries driver

bfin-wdt: initialized: timeout=20 sec (nowayout=0)

usbcore: registered new interface driver usbhid

usbhid: USB HID core driver

ALSA device list:

  No soundcards found.

TCP cubic registered

NET: Registered protocol family 17

rtc-bfin rtc-bfin: setting system clock to 2004-06-01 09:00:15 UTC

(1086080415)

mmc0: host does not support reading read-only switch. assuming write-enable.

mmc0: new SD card at address e624

ata1.00: ATA-6: TOSHIBA MK4032GAX, AD101A, max UDMA/100

ata1.00: 78140160 sectors, multi 16: LBA48

ata1.00: configured for UDMA/66

blk_queue_max_segments: set to minimum 1

scsi 0:0:0:0: Direct-Access     ATA      TOSHIBA MK4032GA AD10 PQ: 0 ANSI: 5

sd 0:0:0:0: [sda] 78140160 512-byte logical blocks: (40.0 GB/37.2 GiB)

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

sda: detected capacity change from 0 to 40007761920

sda: sda1 sda2

sd 0:0:0:0: [sda] Attached SCSI disk

net eth0: SMSC911x/921x identified at 0x24000000, IRQ: 175

IP-Config: Complete:

     device=eth0, addr=10.100.4.50, mask=255.255.255.0, gw=10.100.4.174,

     host=bf548-ezkit, domain=, nis-domain=(none),

     bootserver=10.100.4.174, rootserver=10.100.4.174, rootpath=

Freeing unused kernel memory: 8452k freed

usb 1-1: new high speed USB device number 2 using musb-hdrc

scsi1 : usb-storage 1-1:1.0

scsi 1:0:0:0: Direct-Access     SanDisk  U3 Cruzer Micro  6.51 PQ: 0 ANSI: 0

CCS

sd 1:0:0:0: [sdb] 2014271 512-byte logical blocks: (1.03 GB/983 MiB)

sd 1:0:0:0: [sdb] Write Protect is off

sd 1:0:0:0: [sdb] Mode Sense: 45 00 00 08

sd 1:0:0:0: [sdb] Assuming drive cache: write through

sd 1:0:0:0: [sdb] Assuming drive cache: write through

sdb: detected capacity change from 0 to 1031306752

sdb: sdb1 sdb2

sd 1:0:0:0: [sdb] Assuming drive cache: write through

sd 1:0:0:0: [sdb] Attached SCSI removable disk

root:/>

Case 1 ...PASS

 

Case 1 ...PASS

 

Close.

 

 

 

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