vmware fusion 8 high sierra apfs resume slow

Vmware fusion 8 high sierra apfs resume slow software#

(sorry for the edits, I finally found the paragraph my memory was referring to)įor the most part the hardware in on a hackintosh isn't going to be worse than what apple is selling. Further, their complex firmware can (does) contain bugs that can result in data loss.' SSDs have a multitude of components, and in volume consumer products they rarely contain end-to-end ECC protection leaving the possibility of data being corrupted in transit. In addition, there are other sources of device errors where a file system’s redundant check could be invaluable. That’s small by comparison, but bear in mind that the SSD’s ECC is required for the expected analog variances within the media.) The devices have a bit error rate that’s tiny enough to expect no errors over the device’s lifetime. (For reference, ZFS uses a fixed size 32 byte checksum for blocks ranging from 512 bytes to megabytes.

128 bytes per 4KB page, so that errors can be corrected and detected. The engineers contend that Apple devices basically don’t return bogus data. Both flash SSDs and magnetic media HDDs use redundant data to detect and correct errors. The APFS engineers I talked to cited strong ECC protection within Apple storage devices. 'Explicitly not checksumming user data is a little more interesting. So, yes the first thing I think when I hear filesystem corruption is BUG! That is what the experience of tracking down a number of incidents in a large data storage application a few years ago taught me. Or the more likely case of the machine performance degrading due to read retry/ecc correction/retransmission making the machine appear to have severe performance issues long before it manifests as silent data corruption sufficient to eat the filesystem structure (its a fun excise to intentionally flip a few random bits on a hard-drive image (or in RAM)) and see if/when they are detected. That is because the likelyhood of undetected hardware failures given the layers and layers of ECC on the disks, links/etc manifesting itself as filesystem meta data failures rather than garbage in the middle of video/images/document streams/etc is really unlikely. Bit rot, stuck bits, bad links are a thing, but they generally show up as massive soft error correction long before it reaches the point of simply being unable to read the sector and when that happens the OS will almost always tell you that the sector can't be read rather than giving you garbage data. A random machine which won't boot due to disk/filesystem failures could be a hardware issue, but that is pretty much ruled out if reinstalling/reformatting doesn't immediately manifest in further failure.

Vmware fusion 8 high sierra apfs resume slow software#

Its almost assured there is a software problem in cases where reinstalling the machine fixes the problem. The hardware is likely being blamed for a lot of failures that are software related.