Hi lacko,
In QFX5100, the hardware are managed mostly by Host OS (Linux) and Junos runs as a VM. The host system has two SSD storage devices, each with 16 GB of capacity. From the partition layout perspective, QFX5100 will be running the Linux Volume Manager (LVM).
There are two 16 GB SSDs, which are part of the Linux LVM. The primary volume group is vg0_vjunos. This volume group has three volumes that are used by Junos:
• lv_junos_recovery
• lv_var
• lv_junos
You can see the two disks as /dev/sda and /dev/sdb using these commands:
request app-engine host-shell
fdisk -l
Example:
{master:0}
root@JNPR_QFX5100> request app-engine host-shell
Last login: Wed Jul 17 18:23:15 from 192.168.1.2
--- Host 14.1X53-D40.8 built 2016-11-10 02:56:31 UTC
-sh-4.1# fdisk -l
Disk /dev/sda: 16.0 GB, 16013852672 bytes
255 heads, 63 sectors/track, 1946 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000214ab
Device Boot Start End Blocks Id System
/dev/sda1 * 1 125 1000000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 125 1857 13914062+ 83 Linux
Disk /dev/sdb: 16.0 GB, 16013852672 bytes
255 heads, 63 sectors/track, 1946 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000600f6
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 125 1000000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sdb2 125 1857 13914062+ 83 Linux
Disk /dev/mapper/vg0_vjunos-lv_junos: 12.9 GB, 12884901888 bytes
255 heads, 63 sectors/track, 1566 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg0_vjunos-lv_junos_recovery: 4294 MB, 4294967296 bytes
255 heads, 63 sectors/track, 522 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg0_vjunos-lv_var: 11.3 GB, 11307843584 bytes
255 heads, 63 sectors/track, 1374 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Read more on this from the nice reference here:
https://forums.juniper.net/t5/Ethernet-Switching/QFX5100-architecture-hardware-and-flow-process/td-p/295819
Hope this helps.
Regards,
-r.
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If this solves your problem, please mark this post as "Accepted Solution."
Kudos are always appreciated :).