Andreas W

Hi Thanks for answer! ECC ram - good idea - will make sure to use such. Current installation will be windows (later down the road might switch to linux and zfz or similar) For now I will go with ECC ram + drivepool + stablebit scanner + snapraid/md5deep (think I will start with trying this one: https://github.com/marcopaganini/bitrot + a bit of scripting to have it run weekly on all drives) Updated Drivepool feature wish * at every write, calculate and write checksum * have a check/scan command that can be run daily/weekly/monthly uses checksums and verifies data integrity /Andreas

Hi I am starting building out my home storage system and learning as I go. Below is my current thinking/question I will use drivepool and with all pool/files duplicated. I will have additional backups (cloud and local) I feel ok against drive-failures, against entire system failing etc. My question is - how do I protect against silent bitrot I know drivepool via integrated scanner will find blocks that are bad. But how do I protect against silent bit flip. I know its very rare. But still - would be nice to know how to protect against it Question does drivepool secure against "silent bitrot" Lets say a file fileA is stored in diskpool and dubplicated on two drives and one of the drives a bit flips, changes value from say 1 to 0. At this point in time I will have * disk1: fileA (correct file) * disk2: fileA (corrupt file) Question: Does diskpool have a "diskpool check" command that checks all files (all duplicates) and detects corrupted files? Question: Next read of file1 - will it be the fileA from disk1 or from disk2? or? Question: Will diskpool detect that fileA is now different on disk1 vs disk2? Essentially * will diskpool detect a underlying bit-root like this? * will it in addition to detect it be able to fix it? If not - sounds like a great value-add feature - ex everytime diskpool writes a file it also calculates and stores a checksum of the file * option to enable: write verification: after write - read both duplicates and verify checksum dispool check command * reads all files (all duplicates) and verifies that checksum is as expected diskpool file read * option to enable: read verification: everytime diskpool reads a file - verifies that read file checksum is as expected * option to enable: read verification all duplicated: everytime diskpool reads a file - reads all duplicates and verifies that read files checksum are as expected /Andreas