OS X 10.8.5 causes external disk to eject improperly

I have the same issue with multiple computers and external drives. First I had MBP 2011 with 10.8 and LaCie 2big Thunderbolt Raid 1 drive, 6TB. Drive ejected every now and then, usually after wake up from sleep but also intermittently. Eventually the LaCie drive failed. It broke and if you don't know then they don't fix broken drives..... (Can't recommend LaCie to anyone though the drive was good until it broke down).

Now I have replaced the LaCie with Vantec HXR4 4 drive Raid 5 setup using two of the LaCie HD's and two new identical ones. All drives formatted and Disk repaired with Disk utility. 12TB with 9TB of usable space. Same problem occurred. Intermittent ejection. Some days are worse than others. Sometimes I could get several hours of work but some day I could hardly get anything done.

I then replace the MBP with a brand new 27" iMac with 1TB Fusion drive and Mavericks. Same problem but it's getting worse! I took the HX4R drive to the dealer for repair. He said that after 1 hour the problem happened using 4 of his own HD's. Eventually replacing the housing and power supply. I plug it in at work and F…k. Same problem.

With 2 computers, 3 different USB cables, 2 sets of 4 Hd’s, two different enclosures I have to conclude that this has to do with APPLE software, not hardware. I've tried to Google the problem a few times being too specific in regards to the drives an not getting anything useful. Finally this came up using "mac lion raid 5 disk not ejected properly" and "mac mavericks raid disk not ejected properly"

I'm a professional photographer and I store a few terabytes of valuable image collection on it. I have backups but I need a drive and a setup that works so I can get my work done.

I have this problem too with my Lacie 3tb I am on 10.9

I have this bug too with 2 G-Tech Raid hard-drive of 8TB each with OS X 10.9.1 buyed from Apple Store Online , this is an OS X bug but will Apple fix-it soon.

Bug or No Bug? That is the question. I also have the same issue with an external Thermaltake chasis with a 1TB Maxtor drive attached via USB. The uncool side affect is the disk corruption as a result of the unmounting either before, during or after sleep/hibernation. The bug is getting cob webs Apple.

Apple doesn’t routinely monitor the discussions.

Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.

Feedback

Hi jonpallv,

I have the exact same seme setup with the HX4R and experiencing the same EJECTS. Did you get it solved by any chance?

Regards,

Zax

Same issue. I can't pin a time when it started, but it has been recently. I wanna say withing the past 3 months. Dispite the before mentioned MacRumors post about 10.8.5 having a fix for this, it continues. To avoid it I have set my computer sleep and display settings to "Never" which is only going to shorten the life of my $1,000 27" Apple display. I have lost many hours of production having to start rendering projects over and over again. I don't quite understand how something that wasn't happening before can't be fixed quickly. BTW, it happens to all my different brands of drives so it's definitely not limited to any particular brand and it happens to my 2010 MacPro, 2013 MacBook Pro and 2014 iMac. It is most definitely an Apple OS issue.

I am still having this issue..

even with a disk that stays in my sd card slot.

I have 128 gig sd card that stays in the slot and it always gives me this error.

when it hibernates or I shut it down.

I have the latestet 10.9.2

Ziggy

I too am running the latest update 10.9.2 and it happens every time the computer goes to sleep. For many of us, the updated that helped you did nothing on our end.