Hello,
I have a single NVME port available on my mobo, and I want to use it as SLOG for a disk pool. As I see it my options are:
1. Enterprise NVME drive with powerless protection. No-go...too expensive.
2. Consumer, high-performance NVME drive. Contains DRAM cache which may not be flushed to disk following a power-loss event, i.e., lost data & corrupted pools. No-go.
Now, how about this:
3. Consumer, low performance NVME drive. I would pick a drive like the WD Blue that does not have a DRAM cache or use host memory for cache (Host Memory Buffer), eliminating the chance that data would be lost in a disk buffer during a power loss event. Such a drive would be more than fast enough to support the needs of my mechanical drive pool, and it's so cheap that I don't care about wearing it out with SLOG writes.
Can someone do a sanity check on my reasoning here?
I have a single NVME port available on my mobo, and I want to use it as SLOG for a disk pool. As I see it my options are:
1. Enterprise NVME drive with powerless protection. No-go...too expensive.
2. Consumer, high-performance NVME drive. Contains DRAM cache which may not be flushed to disk following a power-loss event, i.e., lost data & corrupted pools. No-go.
Now, how about this:
3. Consumer, low performance NVME drive. I would pick a drive like the WD Blue that does not have a DRAM cache or use host memory for cache (Host Memory Buffer), eliminating the chance that data would be lost in a disk buffer during a power loss event. Such a drive would be more than fast enough to support the needs of my mechanical drive pool, and it's so cheap that I don't care about wearing it out with SLOG writes.
Can someone do a sanity check on my reasoning here?