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250 means you are using flash media. With HDD's performance is completely unacceptable.
250 for SSD writes is probably normal, NVMe would be somewhat faster.
The RAID 0 alternative recommendation was for HDD's.
Posted : 01/02/2025 9:20 pm
250 means you are using flash media. With HDD's performance is completely unacceptable.
250 for SSD writes is probably normal, NVMe would be somewhat faster.
The RAID 0 alternative recommendation was for HDD's.
250MB/s across 4 SSDs in a RAID 5 is normal? The same configuration does 1GB/s on unencrypted APFS volumes.
Posted : 01/02/2025 9:25 pm
@softraid-support What if I'm on MacOS Catalina where there is native encrypted HFS support? Is there a workaround? I tried to force it using terminal subdividing the RAID 5 volume and inserting a GPT slice so that I can utilize native CoreStorage, but the GPT slice never remained. I'd read elsewhere on the forum that you were experimenting with implementing with implementing encrypted HFS, but that it's a rather difficult workaround?
Posted : 28/05/2025 11:51 pm
We have tried working around this, but no, we have not made progress. It may not be possible, unless Apple makes an update to HFS+ or Core Storage.
RAID 0 is an option, which has the issue of not being redundant. RAID 1+0 also.
Posted : 28/05/2025 11:55 pm
@softraid-support Got it. And re: "unit stripe size" on encrypted APFS RAID 5 volumes utilizing 8TB HDDs, if I'm primarily dealing with larger files (30-100GB), what's the best choice? 16 KB or 64 KB?
Posted : 29/05/2025 5:17 am
64k was added for better Windows performance, it does not really matter on MacOS, in any testing I have done. So leave the default 16k
Posted : 29/05/2025 9:03 am
@softraid-support Did some testing on a 2012 Mac running MacOS Catalina: sustained writes were much slower with the 64 KB unit stripe size across four 8 TB HDDs in a ThunderBay 4 (TB2 version) configured as RAID 5.
This post was modified 11 months ago by NormanBumdar
Posted : 29/05/2025 2:40 pm
No, this change is likely to require a MacOS change its not there.
Posted : 26/09/2025 4:50 am
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