Good morning, 

I am having trouble mapping volumes using rbd. It used to work with v1 (I 
haven't tried it in a couple of years), but now we are using Quincy (v17) and I 
am getting this error: 

rbd --mon-host 10.10.3.1:3300,10.10.3.2:3300,10.10.3.3:3300 -p volumes map 
volume-c33b1ea9-c976-438b-8c3c-21cdf2db8bfd 

rbd: sysfs write failed 

In some cases useful info is found in syslog - try “dmesg | tail”. 




The mons are available and responding on port 3300. 

The volume I want to map is available, and I have disabled features: 

rbd --mon-host 10.10.3.1:3300,10.10.3.2:3300,10.10.3.3:3300 -p volumes info 
volume-c33b1ea9-c976-438b-8c3c-21cdf2db8bfd 

rbd image ‘volume-c33b1ea9-c976-438b-8c3c-21cdf2db8bfd’: 

size 200 GiB in 51200 objects 

order 22 (4 MiB objects) 

snapshot_count: 0 

id: f6b4e9515f007c 

block_name_prefix: rbd_data.f6b4e9515f007c 

format: 2 

features: layering 

op_features: 

flags: 

create_timestamp: Wed Dec 15 20:11:41 2021 

access_timestamp: Thu Oct 2 12:04:14 2025 

modify_timestamp: Wed Oct 15 17:36:12 2025 




It does NOT seem to be an authentication issue, as I have used the admin user 
and key and the result is the same. 

Any ideas are welcome. 
Regards, I 

-- 
Jose Ibán Cabrillo Bartolomé 
[email protected] 
Tlfno (+34) 942200969 

Servicio de Computación Avanzada - Advanced Computing Service 
advancedcomputing.ifca.es 

Instituto de Física de Cantabria (IFCA) | CSIC · UC 
Ed. Juan Jordá, Avda. de los Castros s/n - 39005 Santander (Spain) 
www.ifca.es 

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