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Aug
14
comment Why is my RAID1 or RAID10 virtual drive (6 SSDs) not significantly faster than a single SSD?
6 Gbps throughput per port is max according to the spec-sheet. I'd say you're reading from cache. Use iometer with a large dataset or around 2GB to offset the cache.
Aug
13
comment Why is my RAID1 or RAID10 virtual drive (6 SSDs) not significantly faster than a single SSD?
Something looks wrong there. Is that MegaBytes per second? and you say it doesn't scale with larger block sizes? something is seriously wrong. My ethernet network is faster. You shouldn't be getting such slow speeds from SSD drives no matter the configuration. Check the system logs and make sure there are no errors that need to be addressed.
Aug
13
comment How to know whether network card has failed in Linux?
To rule out a bad switch port, flick it over and see what you get. I've seen these messages before but it hasn't been bad.
Aug
12
revised How do I detect what is changing file ownership on Linux?
added 169 characters in body
Aug
12
answered How do I detect what is changing file ownership on Linux?
Aug
11
comment Routing traffic from LAN over VPN link out to 'net; works from router, not from LAN. What route is missing?
Maybe you need Proxy Arp on Router S1
Aug
11
comment Routing traffic from LAN over VPN link out to 'net; works from router, not from LAN. What route is missing?
Is Router S1 the internet Router for the YYY.56.52.56 network?
Aug
2
awarded  Popular Question
Aug
1
comment XenServer 6.2 Read Only and Slow Disk I/O
Have you looked at the logs on the drobo's? You might find a ton of surprises in there. Actually we have some drobos within my company and a colleague mentioned they were somewhat unreliable. Still, I'd start there since the problems seem to be affecting multiple VM's across several servers by the sounds of it.
Jul
30
comment Unable to RDP to Windows Server 2012 via VPN connection
He says it works locally.
Jul
28
comment What types of systems have to “scale up” rather than “scale out”?
The reason RDBMS are tightly coupled is because they are tightly coupled to the data. i.e. multiple servers accessing the same resource.
Jul
28
revised What types of systems have to “scale up” rather than “scale out”?
added 785 characters in body
Jul
28
revised Server won't start. IPMI showing Blue Screen with Ubuntu Linux
added 74 characters in body
Jul
28
comment Server won't start. IPMI showing Blue Screen with Ubuntu Linux
No. A ceph cluster node.
Jul
27
answered Server won't start. IPMI showing Blue Screen with Ubuntu Linux
Jul
27
awarded  Yearling
Jul
27
comment Server won't start. IPMI showing Blue Screen with Ubuntu Linux
I'd like to say that was it, but it wasn't. I have GRUB_GFXMODE= comment out. And I have GRUB_TERMINAL=console set. Unfortunately because of the slow IPMI screen update and the long distance to the server (10,600+ km direct)... you can imagine that getting to see what the error is is not too easy. I'll get my colleague to have a look.
Jul
27
comment Server won't start. IPMI showing Blue Screen with Ubuntu Linux
hmm, I'll have a look at that. That could be a possibility
Jul
25
comment Server won't start. IPMI showing Blue Screen with Ubuntu Linux
I'll have to send my collegue in who's based there. Hopefully he'll have an idea. Apparenly the USB issue last time was due to having an OLD USB keyboard plugged in. There are no keyboards plugged in right now.
Jul
25
comment Server won't start. IPMI showing Blue Screen with Ubuntu Linux
I can't actually tell whether it got through the POST. There is nothing in the IPMI log. I'm guessing it didn't. IPMI across the world is rather slow as you can imagine.