我最近购买了一个非常非常便宜的 SSD（25.99 美元），出于好奇，我打开了机箱。
闪存芯片在零件编号上刻有条形，这是我以前从未见过的。
这是将芯片标记为不合格品的标准方法吗？
编辑：我买了其中两个放入 RAID-1，因为我不太信任它们，另一个有相同的标记：
这个使用的是美光闪光灯，虽然标记是相同的。
在这一点上，我只能认为隐藏闪存零件编号的尝试一定是非常非常非常无效的尝试？
微米部分是MT29F128G08CBECBH6-12:C16GB 的部分，所以有 64GB 的原始存储。
其他部分是“Spectek”品牌，这显然是我以前从未听说过的微米子公司。它们似乎是FBNL95B71KDBABH6-10AL，也是 16 GByte 的部分。
编辑：
第一个驱动器sudo badblocks -b 4096 -c 4096 -s -w /dev/sdm没有错误地通过，因此显然容量是真实的，并且它们至少适合一次写入。
编辑编辑：
更正：要么badblocks是我的 el-cheapo USB-sata 适配器崩溃，要么他们确实有一些问题。
编辑编辑编辑：
好的，badblocks在驱动器上运行似乎严重混淆了磁盘。这是SMART报告：
durr@mainnas:/media/Storage/badblocks⟫ sudo smartctl /dev/sdm -a
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.13.0-79-generic] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Device Model: KingDian S200 60GB
Serial Number: 2016022700031
LU WWN Device Id: 0 000000 000000000
Firmware Version: 20150818
User Capacity: 60,022,480,896 bytes [60.0 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: Solid State Device
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: ACS-2 (minor revision not indicated)
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 1.5 Gb/s)
Local Time is: Sun Mar 20 19:15:31 2016 PDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x02) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Disabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: ( 0) seconds.
Offline data collection
capabilities: (0x11) SMART execute Offline immediate.
No Auto Offline data collection support.
Suspend Offline collection upon new
command.
No Offline surface scan supported.
Self-test supported.
No Conveyance Self-test supported.
No Selective Self-test supported.
SMART capabilities: (0x0002) Does not save SMART data before
entering power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 10) minutes.
SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x0000 100 100 050 Old_age Offline - 0
5 Reallocated_Sector_Ct 0x0002 100 100 050 Old_age Always - 0
9 Power_On_Hours 0x0000 100 100 050 Old_age Offline - 2
12 Power_Cycle_Count 0x0000 100 100 050 Old_age Offline - 6
160 Unknown_Attribute 0x0000 100 100 050 Old_age Offline - 0
161 Unknown_Attribute 0x0000 100 100 050 Old_age Offline - 125
162 Unknown_Attribute 0x0000 100 100 050 Old_age Offline - 1
163 Unknown_Attribute 0x0000 100 100 050 Old_age Offline - 20
164 Unknown_Attribute 0x0000 100 100 050 Old_age Offline - 4943
165 Unknown_Attribute 0x0000 100 100 050 Old_age Offline - 12
166 Unknown_Attribute 0x0000 100 100 050 Old_age Offline - 1
167 Unknown_Attribute 0x0000 100 100 050 Old_age Offline - 4
192 Power-Off_Retract_Count 0x0000 100 100 050 Old_age Offline - 6
194 Temperature_Celsius 0x0000 100 100 050 Old_age Offline - 40
195 Hardware_ECC_Recovered 0x0000 100 100 050 Old_age Offline - 0
196 Reallocated_Event_Count 0x0000 100 100 050 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0000 100 100 050 Old_age Offline - 6
241 Total_LBAs_Written 0x0000 100 100 050 Old_age Offline - 2857
242 Total_LBAs_Read 0x0000 100 100 050 Old_age Offline - 72
245 Unknown_Attribute 0x0000 100 100 050 Old_age Offline - 9517
Warning! SMART ATA Error Log Structure error: invalid SMART checksum.
SMART Error Log Version: 1
Warning: ATA error count 0 inconsistent with error log pointer 1
ATA Error Count: 0
CR = Command Register [HEX]
FR = Features Register [HEX]
SC = Sector Count Register [HEX]
SN = Sector Number Register [HEX]
CL = Cylinder Low Register [HEX]
CH = Cylinder High Register [HEX]
DH = Device/Head Register [HEX]
DC = Device Command Register [HEX]
ER = Error register [HEX]
ST = Status register [HEX]
Powered_Up_Time is measured from power on, and printed as
DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes,
SS=sec, and sss=millisec. It "wraps" after 49.710 days.
Error 0 occurred at disk power-on lifetime: 21930 hours (913 days + 18 hours)
When the command that caused the error occurred, the device was in an unknown state.
After command completion occurred, registers were:
ER ST SC SN CL CH DH
-- -- -- -- -- -- --
00 03 ff 93 01 00 ce
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
03 00 00 00 00 00 b9 00 00:00:00.288 CFA REQUEST EXTENDED ERROR
00 00 00 00 00 00 01 00 00:00:00.000 NOP [Abort queued commands]
00 00 b3 01 18 00 08 00 00:00:00.000 NOP [Abort queued commands]
00 02 01 00 00 00 00 4c 16:05:33.861 NOP [Reserved subcommand] [OBS-ACS-2]
03 00 07 00 00 00 ce 00 00:18:34.183 CFA REQUEST EXTENDED ERROR
Error -4 occurred at disk power-on lifetime: 0 hours (0 days + 0 hours)
When the command that caused the error occurred, the device was active or idle.
After command completion occurred, registers were:
ER ST SC SN CL CH DH
-- -- -- -- -- -- --
04 51 f0 d0 3e 44 a0 Error: ABRT
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
b0 d0 01 00 4f c2 a0 00 00:00:00.000 SMART READ DATA
b0 d5 01 01 4f c2 a0 00 00:00:00.000 SMART READ LOG
b0 d5 01 00 4f c2 a0 00 00:00:00.000 SMART READ LOG
b0 da 00 00 4f c2 a0 00 00:00:00.000 SMART RETURN STATUS
b0 d1 01 01 4f c2 a0 00 00:00:00.000 SMART READ ATTRIBUTE THRESHOLDS [OBS-4]
Warning! SMART Self-Test Log Structure error: invalid SMART checksum.
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Extended offline Completed without error 00% 0 -
Selective Self-tests/Logging not supported
在这一点上，我已经开车大约一周了。我不知道 918 天前它是如何出现错误的。
另外：Error -4。是的，我不认为 SMART 日志应该有负数。哎呀？
此时，如果我用坏块重新测试驱动器，设备实际上会掉线，然后重新连接。
durr@mainnas:/media/Storage/badblocks⟫ dmesg | tail -n 50
[2048975.197941] sd 12:0:0:0: [sdm] Mode Sense: 28 00 00 00
[2048975.198218] sd 12:0:0:0: [sdm] No Caching mode page found
[2048975.198728] sd 12:0:0:0: [sdm] Assuming drive cache: write through
[2048975.200188] sd 12:0:0:0: [sdm] No Caching mode page found
[2048975.200633] sd 12:0:0:0: [sdm] Assuming drive cache: write through
[2048975.214949] sdm: unknown partition table
[2048975.215831] sd 12:0:0:0: [sdm] No Caching mode page found
[2048975.216456] sd 12:0:0:0: [sdm] Assuming drive cache: write through
[2048975.216915] sd 12:0:0:0: [sdm] Attached SCSI disk
[2049068.016741] usb 3-5: reset high-speed USB device number 16 using xhci_hcd
[2049068.036966] usb 3-5: device firmware changed
[2049068.037001] usb 3-5: USB disconnect, device number 16
[2049068.040592] scsi 12:0:0:0: rejecting I/O to offline device
[2049068.041057] scsi 12:0:0:0: [sdm] killing request
[2049068.041063] scsi 12:0:0:0: [sdm]
[2049068.041064] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[2049068.041065] scsi 12:0:0:0: [sdm] CDB:
[2049068.041066] Read(10): 28 00 00 44 3e d0 00 00 f0 00
[2049068.041070] end_request: I/O error, dev sdm, sector 4472528
[2049068.041520] scsi 12:0:0:0: rejecting I/O to offline device
[2049068.041974] scsi 12:0:0:0: [sdm] killing request
[2049068.042017] scsi 12:0:0:0: [sdm]
[2049068.042018] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[2049068.042018] scsi 12:0:0:0: [sdm] CDB:
[2049068.042019] Read(10): 28 00 00 44 3f c0 00 00 f0 00
[2049068.042022] end_request: I/O error, dev sdm, sector 4472768
[2049068.056652] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801781c3c80
[2049068.056654] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801781c3cc0
[2049068.168511] usb 3-5: new high-speed USB device number 17 using xhci_hcd
[2049068.259417] usb 3-5: New USB device found, idVendor=152d, idProduct=2329
[2049068.259420] usb 3-5: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[2049068.259421] usb 3-5: Product: USB to ATA/ATAPI bridge
[2049068.259422] usb 3-5: Manufacturer: JMicron
[2049068.259423] usb 3-5: SerialNumber: 201602270003
[2049068.291104] usb-storage 3-5:1.0: USB Mass Storage device detected
[2049068.291152] usb-storage 3-5:1.0: Quirks match for vid 152d pid 2329: 8020
[2049068.291179] scsi13 : usb-storage 3-5:1.0
[2049069.322875] scsi 13:0:0:0: Direct-Access KingDian S200 60GB 2015 PQ: 0 ANSI: 2 CCS
[2049069.323058] sd 13:0:0:0: Attached scsi generic sg12 type 0
[2049069.384321] sd 13:0:0:0: [sdm] 117231408 512-byte logical blocks: (60.0 GB/55.8 GiB)
[2049069.384601] sd 13:0:0:0: [sdm] Write Protect is off
[2049069.384603] sd 13:0:0:0: [sdm] Mode Sense: 28 00 00 00
[2049069.384868] sd 13:0:0:0: [sdm] No Caching mode page found
[2049069.385353] sd 13:0:0:0: [sdm] Assuming drive cache: write through
[2049069.386764] sd 13:0:0:0: [sdm] No Caching mode page found
[2049069.387311] sd 13:0:0:0: [sdm] Assuming drive cache: write through
[2049069.396568] sdm: unknown partition table
[2049069.397466] sd 13:0:0:0: [sdm] No Caching mode page found
[2049069.398067] sd 13:0:0:0: [sdm] Assuming drive cache: write through
[2049069.398513] sd 13:0:0:0: [sdm] Attached SCSI disk
我猜他们会回到亚马逊。我想在我还给他们之前，我会看看我是否能说服对方也失败。
编辑编辑编辑编辑：
是的，当以完全相同的方式进行测试时，第二个驱动器本身就崩溃了。哎呀？