之前發過一個咨詢貼，因為用群輝組的raid1硬碟報錯，無法啟動系統，為了恢復資料，因此需要將riad的兩塊4T硬碟掛在新系統下拷貝出來。
咨詢過群輝官方，給出的答復是通過如下步驟恢復：
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若 Synology NAS 上的磁碟配置為 RAID 或 SHR，請依照步驟 7 到 10 操作；若您想復原的檔案位於僅使用一顆硬碟的基本儲存類型機種，請跳至步驟 10。
輸入以下指令 (sudo 會將執行權限轉換為 root )。
Ubuntu@ubuntu:~$ sudo -i
輸入以下指令來安裝 mdadm 和 lvm2 (皆為 RAID 管理工具)。若沒有安裝 lvm2，vgchange 將無法運作。
root@ubuntu:~$ apt-get update
root@ubuntu:~$ apt-get install -y mdadm lvm2
輸入以下指令來掛載所有從 Synology NAS 取出的硬碟，結果可能會因 Synology NAS 上的儲存集區配置而有所不同。
root@ubuntu:~$ mdadm -Asf && vgchange -ay
輸入以下指令來將所有硬碟掛載為唯讀以存取資料。在 ${device_path} 輸入裝置路徑，${mount_point} 輸入掛載點，您的資料將會被置於掛載點的路徑。
$ mount ${device_path} ${mount_point} -o ro
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Ubuntu@ubuntu:~$ sudo -i
root@ubuntu:~$ apt-get update
root@ubuntu:~$ apt-get install -y mdadm lvm2
root@ubuntu:~$ mdadm -Asf && vgchange -ay
以上命令我都執行了，通過fdisk 資訊如下：
root@leslie-System-Product-Name:~# sudo fdisk -l
Disk /dev/loop0: 4 MiB, 4218880 bytes, 8240 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop1: 149.9 MiB, 157184000 bytes, 307000 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop2: 1008 KiB, 1032192 bytes, 2016 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop3: 54.4 MiB, 57069568 bytes, 111464 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop4: 14.8 MiB, 15462400 bytes, 30200 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop5: 88.5 MiB, 92778496 bytes, 181208 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop6: 42.8 MiB, 44879872 bytes, 87656 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop7: 3.7 MiB, 3825664 bytes, 7472 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x624aa2e0
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 63 145323989 145323927 69.3G 7 HPFS/NTFS/exFAT
/dev/sda2 145338014 1953523711 1808185698 862.2G f W95 Ext'd (LBA)
/dev/sda5 145338016 675854549 530516534 253G 7 HPFS/NTFS/exFAT
/dev/sda6 675854613 1290260474 614405862 293G 7 HPFS/NTFS/exFAT
/dev/sda7 1290260538 1801540297 511279760 243.8G 7 HPFS/NTFS/exFAT
/dev/sda8 1801541632 1953523711 151982080 72.5G 83 Linux
Disk /dev/sdb: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: C94457FF-179B-4C44-A6E5-B4B8EF1684D6
Device Start End Sectors Size Type
/dev/sdb1 2048 4982527 4980480 2.4G Linux RAID
/dev/sdb2 4982528 9176831 4194304 2G Linux RAID
/dev/sdb5 9453280 7813830239 7804376960 3.6T Linux RAID
Disk /dev/mapper/osprober-linux-sdb5: 3.6 TiB, 3995841003520 bytes, 7804376960 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
請問剩下一步
$ mount ${device_path} ${mount_point} -o ro[/b]
這個命令該怎么寫呢？第一次用，小白一個，感謝各位。
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標籤：系統維護與使用區
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