VelcroBP Posted October 2, 2021 Share Posted October 2, 2021 I have recently added a 2nd SSD to form my first cache pool. The existing drive was 250gb and the new one 128gb. Initially after install the total size displayed was correct, but now it is almost half? Am I missing something about configuring cache pools or preparing the SSD ? Quote Link to comment
JorgeB Posted October 3, 2021 Share Posted October 3, 2021 Default mode is raid1, only 128GB can be used, you can change to single profile to use both. Quote Link to comment
Cosine Posted November 19, 2021 Share Posted November 19, 2021 But why is it showing the size as 189GB? Quote Link to comment
JorgeB Posted November 19, 2021 Share Posted November 19, 2021 12 minutes ago, Cosine said: But why is it showing the size as 189GB? That happens when using different capacity devices with RAID1, but used and free space will be correct, if using v6.9 or newer. Quote Link to comment
Cosine Posted November 19, 2021 Share Posted November 19, 2021 Thank you. I think I understand when it happens, I am wondering why it happens. Quote Link to comment
JorgeB Posted November 19, 2021 Share Posted November 19, 2021 11 minutes ago, Cosine said: I am wondering why it happens. It's because of the way Unraid calculates the total capacity, not long ago the free space would also be incorrect in that circumstance, but that was fixed starting on v6.9, IIRC. Quote Link to comment
Cosine Posted November 19, 2021 Share Posted November 19, 2021 Interesting, thanks! Quote Link to comment
FayeInMay Posted June 17, 2023 Share Posted June 17, 2023 On 11/19/2021 at 7:25 PM, JorgeB said: It's because of the way Unraid calculates the total capacity, not long ago the free space would also be incorrect in that circumstance, but that was fixed starting on v6.9, IIRC. Reviving this, because it's the first google result, so maybe interesting for other people. The problem seems to be the same on 6.12.0? Quote Link to comment
JorgeB Posted June 18, 2023 Share Posted June 18, 2023 13 hours ago, FayeInMay said: The problem seems to be the same on 6.12.0? Assuming you are using the default raid1 profile the free/used space are correct, just total capacity will be wrong but that's a known issue with different capacity devices and btrfs. 1 Quote Link to comment
PoloniumTacos Posted February 2 Share Posted February 2 Sorry I need stuff spelled out to understand. So is it I still get the full capacity in Raid 1 even though total capacity is incorrect because of the issue or what you are saying @JorgeB is if we want to utilize the total capacity of both cache drives we should switch from Raid 1 to the one you suggested above? Quote Link to comment
trurl Posted February 2 Share Posted February 2 If you want the combined total capacity of different sized disks you must use Single profile. Quote Link to comment
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