![]() ![]() This was then confirmed by just attempting to read the file without any actual loading. as soon as we removed the files from the backup process, the I/O error and forced dismount stopped. This occurred during two backup attempts, which led us to the diagnosis. our only notification that this was happening was that when the file was accessed (the actual contents read, not just the headers and TOCs), the resulting I/O error force unmounted the drive from the system, claiming we had disconnected it. This means we have no way of determining which of the 4 drives in the primary set is failing, only that as it is doing so, it is leaving bad sectors which are being ignored by both the system and any hardware on the actual drive. Most softwares only see a drive if it is mounted on the desktop, and they only see it as it is presented via the OSX system (so CCC and Disk Warrior see them sufficiently for their job, but iPartition fails miserably in any form, and it and TechTool are horrifyingly dangerous to operate with a JBOD mounted). no SMART info is available from any of the 12 individual SATA drives involved, no software we have sees the drives individually, and most don't even recognize the drives as a single JBOD. Unfortunately, there is no software that comes with OSX, or in about 15 different backup and recoveries softwares that allows any form of information retrieval or maintenance on such drives. please don't.Īt issue, is that for the first time in 3 years, we are now experiencing problems with the primary JBOD drive. I don't need lectures on spotlight or the use/build of JBODs/RAIDs, so if, like on many of the searches I made here, that is your goal. The reason for this is that this configuration is to deal with and encode RAW video, HD and otherwise, and we need ALL the files to be instantly accessible and searchable (with basic metadata), and spotlight is such a POS, that it has been unusable since it's inception. one as a shared network drive (12TB), and two 8TB units one of which is the primary drive, and the other a backup to that drive and which also holds the individual system backups for all the networked computers. entry about prediction reliability.We have 3 JBOD drives set-up. ![]() Perform regular backups and make sure you read all the documentation and the F.A.Q. SMARTReporter is NOT a substitute for regular backups especially as it only concerns itself with hardware-level problems (like physical drive failures) and not at all with software-level problems (like filesystem health) that could also destroy all your data. (or I/O-error checking) catch all possible disk problems before they happen – it’s just a very valuable indicator. alert does not mean that your disk will certainly fail completely, nor can S.M.A.R.T. – the SSD built into the 2015 12″ MacBook ![]() at all and therefore do not work with SMARTReporter: Some internal disks do not support S.M.A.R.T. checking for ATA, SATA or eSATA hard disk drives unless you install additional software to enable Mac OS X to also check the status of some USB/FireWire disks. implementation of Mac OS X, it only supports S.M.A.R.T. Because SMARTReporter relies on the S.M.A.R.T.
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