lsblk
"lsblk lists information about all available or the specified block devices. The lsblk command reads the sysfs filesystem and udev db to gather information." - man lsblkq
Examples
Simple usage
Here is the output of lsblk on an Ubuntu 16.04 Vagrant box:
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 10G 0 disk
└─sda1 8:1 0 10G 0 part /
sdb 8:16 0 10M 0 disk
Show filesystem information
$ lsblk -f
NAME FSTYPE LABEL UUID MOUNTPOINT
sda
└─sda1 ext4 cloudimg-rootfs 73ea38ed-7fcd-4871-8afa-17d36f4e4bfc /
sdb iso9660 cidata 2017-08-15-16-47-34-00
Show some chosen fields
To see a list of available columns, run lsblk -o.
$ lsblk -do NAME,SIZE,TYPE,VENDOR,MODEL,SERIAL
NAME SIZE TYPE VENDOR MODEL SERIAL
sdd 1.8T disk ATA Micron_5100_MTFD 18211C914753
sdb 1.8T disk ATA Micron_5100_MTFD 18211C914736
sde 1.8T disk ATA Micron_5100_MTFD 171216897B54
sdc 1.8T disk ATA Micron_5100_MTFD 171216897B63
sda 223.6G disk ATA INTEL SSDSC2KB24 BTYS815301VG245AGN
## Quick way to view ssd vs hdd models and mount points
## ROTA: 1=hdd, 0=ssd
## As of writing this method does not show zfs mount points. EG: sdb1 is mounted as zfs
##
$ lsblk -o name,rota,mountpoint,vendor,model,serial
NAME ROTA MOUNTPOINT VENDOR MODEL SERIAL
sda 0 ATA Samsung SSD 850 S39KNX0JA59421F
└─sda1 0 /
sdb 1 WD Elements 25A1 575833314435383753393754
├─sdb1 1
└─sdb9 1
sdc 1 Generic External 002210107962
├─sdc1 1
└─sdc2 1 /mnt/sdc
sr0 1 MATSHITA DVD+-RW SW830 CN0X85FC3686
Show all available information
The output here is really wide, but reformatting it through JSON makes it easier to read. Thankfully lsblk has a JSON output option, unlike many unix CLI tools.
$ lsblk -O -J | jq .
{
"blockdevices": [
{
"name": "sda",
"kname": "sda",
"maj:min": "8:0",
"fstype": null,
"mountpoint": null,
"label": null,
"uuid": null,
"parttype": null,
"partlabel": null,
"partuuid": null,
"partflags": null,
"ra": "128",
"ro": "0",
"rm": "0",
"hotplug": "0",
"model": "HARDDISK ",
"serial": null,
"size": "10G",
"state": "running",
"owner": "root",
"group": "disk",
"mode": "brw-rw----",
"alignment": "0",
"min-io": "512",
"opt-io": "0",
"phy-sec": "512",
"log-sec": "512",
"rota": "1",
"sched": "deadline",
"rq-size": "128",
"type": "disk",
"disc-aln": "0",
"disc-gran": "0B",
"disc-max": "0B",
"disc-zero": "0",
"wsame": "0B",
"wwn": null,
"rand": "1",
"pkname": null,
"hctl": "2:0:0:0",
"tran": "spi",
"subsystems": "block:scsi:pci",
"rev": "1.0 ",
"vendor": "VBOX ",
"children": [
{
"name": "sda1",
"kname": "sda1",
"maj:min": "8:1",
"fstype": "ext4",
"mountpoint": "/",
"label": "cloudimg-rootfs",
"uuid": "73ea38ed-7fcd-4871-8afa-17d36f4e4bfc",
"parttype": "0x83",
"partlabel": null,
"partuuid": "8d714561-01",
"partflags": "0x80",
"ra": "128",
"ro": "0",
"rm": "0",
"hotplug": "0",
"model": null,
"serial": null,
"size": "10G",
"state": null,
"owner": "root",
"group": "disk",
"mode": "brw-rw----",
"alignment": "0",
"min-io": "512",
"opt-io": "0",
"phy-sec": "512",
"log-sec": "512",
"rota": "1",
"sched": "deadline",
"rq-size": "128",
"type": "part",
"disc-aln": "0",
"disc-gran": "0B",
"disc-max": "0B",
"disc-zero": "0",
"wsame": "0B",
"wwn": null,
"rand": "1",
"pkname": "sda",
"hctl": null,
"tran": null,
"subsystems": "block:scsi:pci",
"rev": null,
"vendor": null
}
]
},
{
"name": "sdb",
"kname": "sdb",
"maj:min": "8:16",
"fstype": "iso9660",
"mountpoint": null,
"label": "cidata",
"uuid": "2017-08-15-16-47-34-00",
"parttype": null,
"partlabel": null,
"partuuid": null,
"partflags": null,
"ra": "128",
"ro": "0",
"rm": "0",
"hotplug": "0",
"model": "HARDDISK ",
"serial": null,
"size": "10M",
"state": "running",
"owner": "root",
"group": "disk",
"mode": "brw-rw----",
"alignment": "0",
"min-io": "512",
"opt-io": "0",
"phy-sec": "512",
"log-sec": "512",
"rota": "1",
"sched": "deadline",
"rq-size": "128",
"type": "disk",
"disc-aln": "0",
"disc-gran": "0B",
"disc-max": "0B",
"disc-zero": "0",
"wsame": "32M",
"wwn": null,
"rand": "1",
"pkname": null,
"hctl": "2:0:1:0",
"tran": "spi",
"subsystems": "block:scsi:pci",
"rev": "1.0 ",
"vendor": "VBOX "
}
]
}