Filesystem missing on server

Issue

• Filesystem missing on the server.
• From the df output I can see the following /data/ files mounted but /data/12 as you mentioned cannot be seen.

/dev/sdb       1922699152 1612268060 212757004  89% /data/1
/dev/sdc       1922699152 1611410764 213614300  89% /data/2
/dev/sdd       1922699152 1574436968 250588096  87% /data/3
/dev/sde       1922699152 1611166164 213858900  89% /data/4
/dev/sdf       1922699152 1566881624 258143440  86% /data/5
/dev/sdg       1922699152  858669384 966355680  48% /data/6
/dev/sdh       1922699152 1590036016 234989048  88% /data/7
/dev/sdi       1922699152 1591435096 233589968  88% /data/8
/dev/sdj       1922699152 1570753288 254271776  87% /data/9
/dev/sdk       1922699152 1615340544 209684520  89% /data/10
/dev/sdl       1922699152 1596828564 228196500  88% /data/11