'show system storage' and 'show chassis hardware detail' outputs have diverse file system device names such as ad0, ad1, ad2, ad3, da0, and so on . The information below explains what these file system device names mean.
Juniper products operated by Junos, such as M / T / J-series routers, MX-series, and EX switches have different types of physical storage devices. This results in different file system device names when issuing the show system storage CLI command. Below are examples.EX4200 switch:
show system storage
user@device> show system storage Filesystem Size Used Avail Capacity Mounted on/dev/da0s2a 92M 71M 14M 83% /devfs 1.0K 1.0K 0B 100% /devdevfs 1.0K 1.0K 0B 100% /dev//dev/md0 30M 30M 0B 100% /packages/mnt/jbase/dev/md1 12M 12M 0B 100% /packages/mnt/jcrypto-ex-9.0R2.10/dev/md2 3.9M 3.9M 0B 100% /packages/mnt/jdocs-ex-9.0R2.10/dev/md3 67M 67M 0B 100% /packages/mnt/jkernel-ex-9.0R2.10/dev/md4 11M 11M 0B 100% /packages/mnt/jpfe-ex42x-9.0R2.10/dev/md5 26M 26M 0B 100% /packages/mnt/jroute-ex-9.0R2.10/dev/md6 9.6M 9.6M 0B 100% /packages/mnt/jswitch-ex-9.0R2.10/dev/md7 13M 13M 0B 100% /packages/mnt/jweb-ex-9.0R2.10/dev/md8 63M 8.0K 58M 0% /tmp/dev/da0s2f 61M 1.4M 55M 2% /var/dev/da0s3e 28M 266K 25M 1% /config/dev/da0s3d 157M 2.6M 142M 2% /var/tmp/dev/md9 118M 7.5M 101M 7% /var/rundbprocfs 4.0K 4.0K 0B 100% /proc/var/jail/etc 61M 1.4M 55M 2% /packages/mnt/jweb-ex-9.0R2.10/jail/var/etc/var/jail/run 61M 1.4M 55M 2% /packages/mnt/jweb-ex-9.0R2.10/jail/var/run/var/jail/tmp 61M 1.4M 55M 2% /packages/mnt/jweb-ex-9.0R2.10/jail/var/tmp/var/tmp 157M 2.6M 142M 2% /packages/mnt/jweb-ex-9.0R2.10/jail/var/tmp/uploadsdevfs 1.0K 1.0K 0B 100% /packages/mnt/jweb-ex-9.0R2.10/jail/dev
user@device-re0> show system storageFilesystem Size Used Avail Capacity Mounted on/dev/ad0s1a 217M 111M 89M 55% /devfs 1.0K 1.0K 0B 100% /devdevfs 1.0K 1.0K 0B 100% /dev//dev/md0 23M 23M 0B 100% /packages/mnt/jbase/dev/md1 80M 80M 0B 100% /packages/mnt/jkernel-8.5-20080404.0/dev/md2 40M 40M 0B 100% /packages/mnt/jpfe-M320-8.5-20080404.0/dev/md3 3.5M 3.5M 0B 100% /packages/mnt/jdocs-8.5-20080404.0/dev/md4 28M 28M 0B 100% /packages/mnt/jroute-8.5-20080404.0/dev/md5 8.8M 8.8M 0B 100% /packages/mnt/jcrypto-8.5-20080404.0/dev/md6 37M 37M 0B 100% /packages/mnt/jpfe-common-8.5-20080404.0/dev/md7 2.0G 8.0K 1.8G 0% /tmp/dev/md8 2.0G 434K 1.8G 0% /mfs/dev/ad0s1e 24M 44K 22M 0% /configprocfs 4.0K 4.0K 0B 100% /proc/dev/ad1s1f 34G 21G 11G 65% /var
root@device> show system storage detailFilesystem 1024-blocks Used Avail Capacity Mounted on/dev/da0s1a 905880 313108 520302 38% /devfs 1 1 0 100% /dev/dev/md0 72690 72690 0 100% /packages/mnt/jbase/dev/md1 402348 402348 0 100% /packages/mnt/jkernel-ppc-21.3I-20220125.0.0828/dev/md2 202372 202372 0 100% /packages/mnt/jpfe-MX80-21.3I-20220125.0.0828/dev/md3 13090 13090 0 100% /packages/mnt/jdocs-21.3I-20220125.0.0828/dev/md4 206020 206020 0 100% /packages/mnt/jroute-ppc-21.3I-20220125.0.0828/dev/md5 23500 23500 0 100% /packages/mnt/jcrypto-ppc-21.3I-20220125.0.0828/dev/md6 23844 23844 0 100% /packages/mnt/jcrypto-dp-support-21.3I-20220125.0.0828/dev/md7 3624 3624 0 100% /packages/mnt/jmacsec-21.3I-20220125.0.0828/dev/md8 5682 5682 0 100% /packages/mnt/jsd-powerpc-21.3I-20220125.0.0828-jet-1/dev/md9 6750 6750 0 100% /packages/mnt/jsdn-powerpc-21.3I-20220125.0.0828/dev/md10 17128 17128 0 100% /packages/mnt/py-base-powerpc-21.3I-20220125.0.0828/dev/md11 14786 14786 0 100% /packages/mnt/py-extensions-powerpc-21.3I-20220125.0.0828/dev/md12 2937460 8 2702456 0% /tmp/dev/md13 2937460 7480 2694984 0% /mfs/dev/da0s1e 100562 88 92430 0% /configprocfs 4 4 0 100% /proc/dev/da1s1f 2936454 926960 1774578 34% /var/var/jails/rest-api 2936454 926960 1774578 34% /packages/mnt/jroute-ppc-21.3I-20220125.0.0828/web-api/vardevfs 1 1 0 100% /packages/mnt/jroute-ppc-21.3I-20220125.0.0828/web-api/dev
Some products list the detailed hardware information about these storage devices in show chassis hardware detail output. Below are examples from the M320 and M120 routers.
show chassis hardware detail
user@device-re0> show chassis hardware detailHardware inventory:Item Version Part number Serial number DescriptionChassis 70000 M320Midplane REV 05 710-009120 R00006 M320 MidplaneRouting Engine 0 REV 09 740-008883 P10000000007 RE-4.0 ad0 245 MB STI Flash 7.3.0 STI0000000000000012 Compact Flash ad1 38154 MB FUJITSU MHV2040AS NT100000000B Hard Disk Routing Engine 1 REV 09 740-008883 P10000000002 RE-4.0 ad0 245 MB STI Flash 7.3.0 ST00000000000000001 Compact Flash ad1 38154 MB FUJITSU MHV2040AS NT0000000006 Hard Disk CB 0 REV 07 710-009115 JR0000 M320 Control BoardCB 1 REV 07 710-009115 JR0000 M320 Control Boardroot@device-re1> show chassis hardware detailHardware inventory:Item Version Part number Serial number DescriptionChassis JN100000000A MX960Midplane REV 03 710-013698 AB000005 MX960 BackplaneRouting Engine 0 REV 15 750-054758 CA000004 RE-S-2X00x6 vtbd0 15360 MB Virtio Block Disk vtbd1 15360 MB Virtio Block Disk ada0 511 MB QEMU HARDDISK Q000002 Emulated IDE Disk usb0 (addr 0.1) XHCI root HUB 0 0x8006 uhub0
Below is the summary of the file system device names in Junos:
ad0 Internal Compact-flashad1Solid Sate Drive (SSD) (for RE-C1800, RE-C2600, RE- A-1800, RE-S-1800)ad2 Hard-disk (for RE-A-2000, RE-A-1000, RE-S-2000, RE-S-1300) or Removable-compact-flash (J2320, J2350, J4300, J6300)ad3 PCMCIA Cardda0 (da1) USB storage device (in EX-series switches, da0 is internal USB flash, da1 is external USB flash)md0 (md1, md2, etc) Memory Virtual Diskvn0 (vn1, vn2, etc) Virtual Node Disk