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Helmut Jarausch wrote: |
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> On 12/14/10 17:42:40, Dale wrote: |
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> |
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>> Hi, |
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>> |
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>> I got one more hard drive to move over and it is SATA. Question one, |
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>> can the new mobo's do hot plugging for SATA drives? I have a plug on |
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>> the front of the case and was wondering since it is on the front if |
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>> they |
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>> |
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> If this is an eSATA connection then it works just fine out of the box. |
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> It's helpful to write some UDEV rule e.g. in /etc/udev/rules.d/10- |
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> local.rules, e.g. |
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> SUBSYSTEMS=="scsi", ATTRS{model}=="WDC WD10EADS-65L", SYMLINK="WDExt%n" |
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> which generates the /dev/WDExt ... /devWDExt4 devices if there are |
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> e.g. 4 partitions on that drive. Thus you can write a fixed entry |
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> in your fstab using these devices. |
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> |
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> |
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|
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So this is doable then. Interesting. ^_^ |
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>> can be hot swapped or if I need to shutdown then hook it up. If I |
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>> can |
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>> |
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>> hot swap, where does the power come from? I know the drives I put in |
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>> the case have a separate power connection. How's that work exactly? |
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>> Is |
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>> that just for external drives that have their own power? |
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>> |
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>> I have two dries in here already. One I bought and one that was |
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>> donated. This is what hdparm reports: |
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>> |
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>> fireball ~ # hdparm -tT /dev/sda |
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>> |
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>> /dev/sda: |
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>> Timing cached reads: 6788 MB in 2.00 seconds = 3395.32 MB/sec |
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>> Timing buffered disk reads: 328 MB in 3.01 seconds = 109.06 MB/ |
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>> sec |
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>> fireball ~ # hdparm -tT /dev/sdb |
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>> |
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>> /dev/sdb: |
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>> Timing cached reads: 6736 MB in 2.00 seconds = 3367.58 MB/sec |
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>> Timing buffered disk reads: 324 MB in 3.01 seconds = 107.69 MB/ |
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>> sec |
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>> |
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> Exactly the same here, the external SATA drive is even slower |
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> /dev/sdd: |
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> Timing cached reads: 7498 MB in 2.00 seconds = 3750.67 MB/sec |
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> Timing buffered disk reads: 262 MB in 3.02 seconds = 86.70 MB/sec |
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> |
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> |
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>> fireball ~ # |
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>> |
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>> Is that about normal? The mobo is 3Gbs/sec and the drives are too. |
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>> Shouldn't they be faster than that? I read at one time that SATA is |
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>> basically plug up and it works. Just checking if there is a setting |
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>> I |
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>> |
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>> need to change. |
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>> |
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>> Related to the above, in the BIOS, it is set to Native IDE. Should |
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>> that |
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>> be set to AHCI instead? Is that why it is slower than expected? Is |
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>> that good to go with Linux as well? I have this set in the kernel |
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>> and |
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>> |
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>> built in as usual: |
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>> |
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>> AHCI SATA support |
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>> |
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> I'have configured my BIOS like that. It's working just fine. |
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> |
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> |
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>> Let me know if I am somewhat right on anything. Oh, I decided to |
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>> name |
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>> |
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>> the new rig fireball instead of lightening. ;-) You may notice that |
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>> in |
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>> the paste up above. |
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>> |
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>> |
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> Helmut. |
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> |
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> |
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Well, according to the mobo book, AHCI "enables advanced SATA |
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features". Me, I read that and I think that it may mean faster. It |
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also says it is set to native by default for OS's that can handle only |
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native mode controllers. I just don't want to try it without making |
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sure it is not going to lead to some sort of file system problems or |
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something. I did some Googling but most of the stuff I find is from |
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years ago and things have changed a lot since then. |
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Thanks for the info. |
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|
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Dale |
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:-) :-) |
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