我使用 Element14 Pi 桌面套件将 SSD 连接到我的 Raspberry Pi 3B+。该驱动器在启动时被识别/dev/sda并正确安装/etc/fstab，但运行一段时间后会消失。
我开始怀疑电源不够（尽管Element14声称2.5A电源足以为rpi+SSD供电），所以我买了一个新的电源，提供高达3.5A（我还没有用我的Kill-确认） a-瓦特）。我重新启动了 pi，并且驱动器像往常一样正确安装，但大约 10 小时后，dmesg显示：
[Fri Apr 17 18:45:11 2020] usb 1-1.3: reset high-speed USB device number 5 using dwc_otg
[Fri Apr 17 18:45:11 2020] sd 0:0:0:0: [sda] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x03 driverbyte=0x00
[Fri Apr 17 18:45:11 2020] sd 0:0:0:0: [sda] tag#0 CDB: opcode=0x28 28 00 00 0c e0 00 00 00 f0 00
[Fri Apr 17 18:45:11 2020] print_req_error: I/O error, dev sda, sector 843776
[Fri Apr 17 18:45:42 2020] sd 0:0:0:0: [sda] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x03 driverbyte=0x00
[Fri Apr 17 18:45:42 2020] sd 0:0:0:0: [sda] tag#0 CDB: opcode=0x28 28 00 00 0c e0 f0 00 00 10 00
[Fri Apr 17 18:45:42 2020] print_req_error: I/O error, dev sda, sector 844016
[Fri Apr 17 18:45:42 2020] usb 1-1.3: USB disconnect, device number 5
[Fri Apr 17 18:45:42 2020] print_req_error: I/O error, dev sda, sector 105121792
[Fri Apr 17 18:45:42 2020] Buffer I/O error on dev sda1, logical block 13139968, lost sync page write
[Fri Apr 17 18:45:42 2020] print_req_error: I/O error, dev sda, sector 843776
[Fri Apr 17 18:45:42 2020] JBD2: Error -5 detected when updating journal superblock for sda1-8.
[Fri Apr 17 18:45:42 2020] Aborting journal on device sda1-8.
[Fri Apr 17 18:45:42 2020] print_req_error: I/O error, dev sda, sector 105121792
[Fri Apr 17 18:45:42 2020] Buffer I/O error on dev sda1, logical block 13139968, lost sync page write
[Fri Apr 17 18:45:42 2020] JBD2: Error -5 detected when updating journal superblock for sda1-8.
[Fri Apr 17 18:45:42 2020] print_req_error: I/O error, dev sda, sector 50333960
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda1): __ext4_get_inode_loc:4708: inode #1572963: block 6291494: comm ldconfig: unable to read itable block
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda1): __ext4_get_inode_loc:4708: inode #1572961: block 6291494: comm ldconfig: unable to read itable block
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda2): ext4_find_entry:1455: inode #131073: comm bash: reading directory lblock 0
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda1): __ext4_get_inode_loc:4708: inode #1572956: block 6291493: comm ldconfig: unable to read itable block
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda1): __ext4_get_inode_loc:4708: inode #1572967: block 6291494: comm ldconfig: unable to read itable block
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda2): ext4_find_entry:1455: inode #131073: comm bash: reading directory lblock 0
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda1): __ext4_get_inode_loc:4708: inode #1572960: block 6291493: comm ldconfig: unable to read itable block
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda2): ext4_find_entry:1455: inode #131073: comm bash: reading directory lblock 0
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda1): __ext4_get_inode_loc:4708: inode #1572955: block 6291493: comm ldconfig: unable to read itable block
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda2): ext4_find_entry:1455: inode #131073: comm bash: reading directory lblock 0
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda1): __ext4_get_inode_loc:4708: inode #1572951: block 6291493: comm ldconfig: unable to read itable block
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda1): __ext4_get_inode_loc:4708: inode #1572950: block 6291493: comm ldconfig: unable to read itable block
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda2): ext4_find_entry:1455: inode #131073: comm bash: reading directory lblock 0
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda1): __ext4_get_inode_loc:4708: inode #1572965: block 6291494: comm ldconfig: unable to read itable block
[Fri Apr 17 18:45:42 2020] EXT4-fs error (device sda1): __ext4_get_inode_loc:4708: inode #1572952: block 6291493: comm ldconfig: unable to read itable block
[Fri Apr 17 18:45:42 2020] Buffer I/O error on dev sda2, logical block 15761408, lost sync page write
[Fri Apr 17 18:45:42 2020] JBD2: Error -5 detected when updating journal superblock for sda2-8.
[Fri Apr 17 18:45:42 2020] Aborting journal on device sda2-8.
[Fri Apr 17 18:45:42 2020] Buffer I/O error on dev sda2, logical block 15761408, lost sync page write
[Fri Apr 17 18:45:42 2020] JBD2: Error -5 detected when updating journal superblock for sda2-8.
此后，该驱动器甚至不再出现在lsblk.是什么导致驱动器消失？