到目前为止，按照该指南中的说明操作一切正常，但我似乎无法解决此错误：
~ $ sudo hdparm --user-master m --security-set-pass NUL /dev/sda
security_password="NUL"
/dev/sda:
Issuing SECURITY_SET_PASS command, password="NUL", user=master, mode=high
SECURITY_SET_PASS: Input/output error
我按照建议进行了搜索和测试这里，但无济于事。如果这不是一个选项，我还能如何深度擦除 SSD？
注意：是的，硬盘“上”有一个 BIOS 密码，因为必须在启动时输入该密码，但（据我所知）它并未附加到磁盘本身。
sudo hdparm -I /dev/sda:
/dev/sda:
ATA device, with non-removable media
Model Number: SanDisk SDSSDA240G
Serial Number: 153655402044
Firmware Revision: U21010RL
Media Serial Num:
Media Manufacturer:
Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0
Standards:
Used: unknown (minor revision code 0x0110)
Supported: 9 8 7 6 5
Likely used: 9
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 268435455
LBA48 user addressable sectors: 468862128
Logical Sector size: 512 bytes
Physical Sector size: 512 bytes
Logical Sector-0 offset: 0 bytes
device size with M = 1024*1024: 228936 MBytes
device size with M = 1000*1000: 240057 MBytes (240 GB)
cache/buffer size = unknown
Form Factor: 2.5 inch
Nominal Media Rotation Rate: Solid State Device
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, no device specific minimum
R/W multiple sector transfer: Max = 1 Current = 1
Advanced power management level: disabled
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
* Security Mode feature set
* Power Management feature set
* Write cache
Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* DOWNLOAD_MICROCODE
Advanced Power Management feature set
SET_MAX security extension
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* General Purpose Logging feature set
* WRITE_{DMA|MULTIPLE}_FUA_EXT
* 64-bit World wide name
* {READ,WRITE}_DMA_EXT_GPL commands
* Segmented DOWNLOAD_MICROCODE
* Gen1 signaling speed (1.5Gb/s)
* Gen2 signaling speed (3.0Gb/s)
* Gen3 signaling speed (6.0Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
* Phy event counters
* READ_LOG_DMA_EXT equivalent to READ_LOG_EXT
* DMA Setup Auto-Activate optimization
Device-initiated interface power management
* Software settings preservation
Device Sleep (DEVSLP)
* Data Set Management TRIM supported (limit 8 blocks)
Security:
Master password revision code = 11822
supported
enabled
locked
not frozen
not expired: security count
supported: enhanced erase
Security level high
2min for SECURITY ERASE UNIT. 2min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 5001b44ed2285a3c
NAA : 5
IEEE OUI : 001b44
Unique ID : ed2285a3c
Checksum: correct
Device Sleep:
DEVSLP Exit Timeout (DETO): 70 ms (drive)
Minimum DEVSLP Assertion Time (MDAT): 31 ms (drive)
答案1
我的电脑的 BIOS 上有密码。
删除密码、重新启动并重试上述命令解决了问题。
我的 BIOS 又有密码了。