Hi, Peter Merchant wrote: > > I saw this the other day, and was wondering about it. > > https://www.tomshardware.com/raspberry-pi/add-on-board-lets-you-use-four-nvme-ssds-at-once-with-raspberry-pi-5
Thanks Peter, that's interesting. I wanted two NVMes for a local RAID 1 mirror. Four seems a bit overkill given the Pi's PCI 2.0 bottleneck. Apparently, a simple configuration change lets it run at PCI 3.0 speeds, which are roughly double in theory, but that's officially unsupported and I can't see the data-corruption risk is worth it. Plus this board uses a ‘ASM1184e PCIe Gen 2’ chip so the limit would still apply even if the Pi's limit was raised. https://en.wikipedia.org/wiki/PCI_Express#Comparison_table Rhys wrote: > While on the topic of drives on Pi's; I did read this post by Jeff > Geerling the other day. Might be something worth looking into if you > won't benefit from the additional bandwidth and features of NVMe. > https://www.jeffgeerling.com/blog/2024/radxas-sata-hat-makes-compact-pi-5-nas True, I won't benefit from the NVMes. I was going for those instead of my previous SATA SSD purchases with the idea they'd be more useful in other devices in the future. But you've made me consider if I should just go for capacity instead. > I wonder if I could get SATA and NVMe running as > some kind of cache, with the SATA drives being used for mass storage? There's https://docs.kernel.org/admin-guide/bcache.html SSD in front of RAID array: https://www.jeffgeerling.com/blog/2021/htgwa-use-bcache-ssd-caching-on-raspberry-pi > I am also looking into some of the non-pi SBCs like the Pine64 and > Radxa's for a project Yes, the non-Pi boards interest me, but given I'd like this machine to be stable and not lot of trouble, I appreciate the large effort invested in the Pi 5 and Raspbian. -- Cheers, Ralph. -- Next meeting: Online, Jitsi, Tuesday, 2024-06-04 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
