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No caching mode page present / Assuming drive cache:write through

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https://bbs.archlinux.org – I have arch linux installed in an external hard disk which is placed into an enclosure usb 3.0. External disk is attached to laptop through USB 3.0.When booting some weird information appear:[ 2.366666] scsi 6:0:0:0: Direct-Access FUJITSU MHV2160BT 0000 PQ: 0 ANSI: 5 [ 2.366666] sd 6:0:0:0: [sdb] 312581808 512-byte logical blocks: (160 GB/149 GiB) [ 2.366666] sd 6:0:0:0: [sdb] Write Protect is off [ 2.366666] sd 6:0:0:0: [sdb] Mode Sense: 23 00 00 00 [ 2.366666] sd 6:0:0:0: [sdb] No Caching mode page present [ 2.366666] sd 6:0:0:0: [sdb] Assuming drive cache: writ (HowTos)