Phil, Thanks for your comments below. On Wed, 2017-10-18 at 20:44 -0400, Phil Turmel wrote: > On 10/18/2017 08:06 PM, dfc wrote: > > On Wed, 2017-10-18 at 22:28 +0200, Rudy Zijlstra wrote: > > > USB is indeed not the best choice. > > Rudy, you master of understatement! > > > > > My main question is whether inserting the 5 disks into another > > > > JBOD chasis is likely to work? > > > > > > Yes, this should work. With a little luck you would not even > > > need > > > to force it, as with a component failure all disks should have > > > lost connection at the same time. > > I would be shocked if these disk *won't* assemble. Assembly might > need > --force if any writes were in flight, but I doubt it. > > > > You could test each disk separately -- as long as you only read > > > from them. Only reading is to ensure that no changes are done > > > that > > > make later > > > > Thanks, I will try reading disks and then install in a new chasis. > > Just put them in a chassis and try to assemble. If it succeeds, you > are > done. If assembly fails, report what mdadm had to say. Will do > > > > re-build of the raid difficult. > > > > In particular is mdadm "smart enough" to find all the > > > > components > > > > and/or do I need to do something to help it along? In fact, > > > > our > > > > IT person has suggested that the data may well be lost. > > > > > > Your IT person apparently either thinks the HW failure caused > > > extensive damage, or wants you to do something different, or... > > > is > > > not very knowledgeable about this type of setup. > > Yeah, it does sound like somebody is out of their depth. > > > > > Also, since I first used the JBOD with software raid I came to > > > > realize that the usb connection is not a good choice (though I > > > > have never had problems). What sort of connection (at the low > > > > price end of the market for HDD enclosures) would be better? > > > > eSata or something else? > > > > > > eSATA would work. But depends on the type of enclusure you can > > > get. > > > I leave that to people based in USA, who know what is available > > > there. > > eSATA with a port multiplier should be fine. It's spend a bit more > for > a JBOD with a SAS port and a suitable PCIe adapter. Thank you, I will hunt for JBOD+SAS. I need 5 or perhaps 6 disks in the array and am still searching for a suitable unit. David > > Phil > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" > in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
