On 27/12/20 7:20 am, Nicolas Kovacs wrote: > Hi, > > My workstation is currently equipped with a pair of Western Digital Red 1 TB > SATA disks in a software RAID 1 setup. > > Some stuff like working with virtual machines is a bit slow, so I'm thinking > about replacing the disks by SSD. > I noticed tremendous improvement when I migrated my VM QCOW2 discs to a Crucial MX500 1TB drive. Previously, they were on a HGST Travelstar 1.5TB drive spinning at 5400rpm. You'd get better performance if you stripe set as opposed to a mirror set on that spinning silicon. <digress> When I noticed this improvement, I starting digging up on why the marked improvement. During my k8s setup, I recall measuring IOPS using FIO [0] in order to ensure ETCD functioned appropriately. When I measured IOPS on my 1.5TB drive, it recorded a value of 37 IOPS. With the MX500, that number is 1092 IOPS. [0]: https://www.ibm.com/cloud/blog/using-fio-to-tell-whether-your-storage-is-fast-enough-for-etcd </digress>