On Tuesday 14 December 2010 11:49:00 Dale wrote: > Mark Knecht wrote: > > On Tue, Dec 14, 2010 at 9:13 AM, Dale<rdalek1...@gmail.com> wrote: > >> Mark Knecht wrote: > >>> On Tue, Dec 14, 2010 at 8:42 AM, Dale<rdalek1...@gmail.com> wrote: > >>>> Hi, > >>>> > >>>> I got one more hard drive to move over and it is SATA. Question > >>>> one, can the new mobo's do hot plugging for SATA drives? I have > >>>> a plug on the front > >>>> of the case and was wondering since it is on the front if they can > >>>> be hot swapped or if I need to shutdown then hook it up. If I > >>>> can hot swap, where > >>>> does the power come from? I know the drives I put in the case > >>>> have a > >>>> separate power connection. How's that work exactly? Is that just > >>>> for > >>>> external drives that have their own power? > >>>> > >>>> I have two dries in here already. One I bought and one that was > >>>> donated. > >>>> > >>>> This is what hdparm reports: > >>>> fireball ~ # hdparm -tT /dev/sda > >>>> > >>>> /dev/sda: > >>>> Timing cached reads: 6788 MB in 2.00 seconds = 3395.32 > >>>> MB/sec > >>>> Timing buffered disk reads: 328 MB in 3.01 seconds = 109.06 > >>>> MB/sec > >>>> > >>>> fireball ~ # hdparm -tT /dev/sdb > >>>> > >>>> /dev/sdb: > >>>> Timing cached reads: 6736 MB in 2.00 seconds = 3367.58 > >>>> MB/sec > >>>> Timing buffered disk reads: 324 MB in 3.01 seconds = 107.69 > >>>> MB/sec > >>>> > >>>> fireball ~ # > >>>> > >>>> Is that about normal? The mobo is 3Gbs/sec and the drives are > >>>> too. > >>>> > >>>> Shouldn't they be faster than that? I read at one time that > >>>> SATA is > >>>> > >>>> basically plug up and it works. Just checking if there is a > >>>> setting I > >>>> need > >>>> to change. > >>>> > >>>> Related to the above, in the BIOS, it is set to Native IDE. > >>>> Should that be > >>>> set to AHCI instead? Is that why it is slower than expected? Is > >>>> that > >>>> good > >>>> to go with Linux as well? I have this set in the kernel and built > >>>> in as usual: > >>>> > >>>> AHCI SATA support > >>>> > >>>> Let me know if I am somewhat right on anything. Oh, I decided to > >>>> name > >>>> the > >>>> new rig fireball instead of lightening. ;-) You may notice that > >>>> in the paste up above. > >>>> > >>>> Thanks. > >>>> > >>>> Dale > >>> > >>> The SATA spec allows for hot plugging, so technically yes, but it > >>> also > >>> assumes the drives are in some sort of container so that power and > >>> signals are applied at the right time. > >>> > >>> The plug on the front of your case is probably eSATA which looks > >>> similar but has some small changes. What you want to do is figure > >>> out > >>> which of your MB SATA ports are eSATA compatible and then run one of > >>> those channels to the connector at the front inside your case. > >>> Typically SATA drives are converted to eSATA external drives by > >>> putting them in a case you can get at most computer shops for< > >>> $30 or so. > >>> > >>> Hope this helps, > >>> Mark > >> > >> I did hook the eSATA cable that goes to the front of the case to the > >> eSATA connector on the mobo. Thing is, I think they are all eSATA > >> compatible tho. > >> > >> I think that is what I read in the mobo book. Yea, I read the > >> book. I > >> > >> even followed the instructions for the CPU cooler too. lol > >> > >> I was thinking it needed some sort of power for the drive tho. I > >> didn't > >> think it was like USB stuff. > >> > >> Thanks for the info. > >> > >> Dale > > > > One of my MBs had 6 SATA connectors but only two were eSATA compatible. > > > > Power for my eSATA drive is supplied by the case. > > > > Hope this helps, > > Mark > > It does. It was the one on the front that made me curious tho. I have > used USB for a while but was curious about how it works on the front > with no power for it. I think I'll leave that one alone for now. May > get brave another day tho. > > Thanks. > > Dale > > :-) :-)
you seem to have misunderstood Mark. The power is delivered by the harddisks case. AKA external power supply. esata has 0 power distribution capabilities. Always remember: first unplug the sata cable, wait, then power. This allows the device to flush the cache.
