>>445
俺もSSD/HDDを２台つなげて使っているけど問題ないよ
SSD/LAN USBアダプタ構成にして暫く使っているとIOWAITが100%になるんだよ

当時のsyslogも少し取ってあるけど↓のようなエラーが延々と出て続ける感じ

May 22 07:24:36 xx kernel: [ 1272.356004] Buffer I/O error on device sda2, logical block 4752053
May 22 07:24:36 xx kernel: [ 1272.367191] blk_update_request: I/O error, dev sda, sector 526336 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 0
May 22 07:24:36 xx kernel: [ 1272.367797] blk_update_request: I/O error, dev sda, sector 38542936 op 0x1:(WRITE) flags 0x0 phys_seg 72 prio class 0
May 22 07:24:36 xx kernel: [ 1272.367806] EXT4-fs warning (device sda2): ext4_end_bio:309: I/O error 10 writing to inode 1145160 (offset 0 size 4096 starting block 4817868)
May 22 07:24:36 xx kernel: [ 1272.367813] Buffer I/O error on device sda2, logical block 4752075
May 22 07:24:36 xx kernel: [ 1272.367833] EXT4-fs warning (device sda2): ext4_end_bio:309: I/O error 10 writing to inode 1145158 (offset 0 size 8192 starting block 4817870)

USB刺す所を変えてみたりアダプタ系も色々変えてみたけどIOWAIT問題は改善されなかった