Update Merlin and Ra cluster

Merlin-and-Ra-cluster.md

@@ -20,7 +20,8 @@ Ra Cluster: [Nodes](https://hpc-sysadmins.gitpages.psi.ch/ra/compute.html)
 
 `sinfo -M gmerlin6 -h -N` 
 
-## Personal user storage on Merlin (Ra) 
+## Storage on Merlin (Ra) 
+### Personal
 
 Merlin storage documentation: https://lsm-hpce.gitpages.psi.ch/merlin6/storage.html
 
@@ -32,3 +33,12 @@ Most important info:
 - `/psi/home/$username:` 10GB , Backup 
 
 Data, Data Processing , Conda etc. should be in `/data/user/$username`, as it needs quite some storage, very important things that need to be backup-ed and are small go to `/psi/home/$username` 
+
+### Group projects
+Most (research) groups have a project folder with much more disk quota ("space"), BIO has a total of **3.5 PB**. Check for the quotas (personal and group) with: 
+
+`merlin_quotas` 
+
+As a general rule, `home` and `/data/user/$USER` quotas are usually not changed by the admins (unless you have strong reasons), but the quota of the BIO group folders will be changed upon request by G. Assmann. 
+
+If you want to have access to a specific group folder, you can request this with a [SNOW](https://psi.service-now.com/psisp?id=psi_new_sc_cat_item&sys_id=84f2c0c81b04f110679febd9bb4bcbb1) ticket. Please select the corresponding `unx-bio_xxxx` group. The same form is used to request access to merlin, the corresponding group would be `svc-cluster_merlin6`.