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6

What's the real goal here? If you're just trying to get a pair of disks separate from the main drive array, why not use a PCIe SSD? Otherwise, you're butchering perfectly good and serviceable equipment and increasing the risk profile of the system by making bad modifications. The other approach to get a system drive or space out of an HP Smart Array is to ...


6

If you use the built-in SATA ports, you'll be limited to 2TB by the Intel 5000X chipset. You could put a SATA or SAS PCIe card in the server that supports larger drives.


5

Some operating systems and file systems have 2TB limits. Some BIOS also have limitations as to how large of a drive they can detect. So yes it is absolutely possible that it won't work. If this is a Windows machine then the following article is useful: https://support.microsoft.com/en-us/kb/2581408 More than likely the drive will work. It's likely that ...


4

SATA/SAS are not like hubs, rather they work much like a network switch. This means that a single SATA/SAS port provides the entire advertised banwdwith, independetly from the other ports. In other words, a chipset providing 4x SATA 3.0 ports (6 Gb/s each) has a "SATA backplane" switching capability of 4x6 Gb/s = 24 Gb/s. For a 4x SAS 3.0 ports (12 Gb/s ...


4

Strange, I've done this several times without such outcome. hdparm --security-help hdparm --security-set-pass NULL /dev/my_ssd hdparm --security-erase NULL /dev/my_ssd Usually they drop their data instantly and then are working as a new devices. And hdparm will refuse to send erase command without setting NULL or any password first. Do you actually see ...


4

I can't believe nobody mentioned AHCI yet... your SATA controller has to be in AHCI mode to enable hot swap. Check this by looking at the driver you are using: root@peter:~ # find /sys -name sdk /sys/devices/pci0000:00/0000:00:11.0/ata5/host4/target4:0:0/4:0:0:0/block /sdk /sys/block/sdk /sys/class/block/sdk root@peter:~ # readlink /sys/devices/pci0000:...


3

It's going to share the SATA controller's bandwidth while in reading or writing from the optical drive, but since you don't plan on using the disk often I don't see how this would have a measurable impact on performance. Older IDE systems could slow down to the slowest item on the bus, so this is probably why you remember not putting optical and storage on ...


3

I was able to get this to work on my Western Digital WD20EURS. After piecing together tips from all over google, I was able to get a master password, research the commands of hdparm, and use your example in your original question to resolve my issue. Maybe this will help with you too. First off, I found a list of master passwords for various brands of ...


3

Use HP SAS disks with Smart Array P410 RAID controllers. SATA drives will downshift speed to 3.0Gbps on that controller. You can have monitoring and fan speed problems with random SATA disks on that controller. 2.5" SATA drives aren't particularly low cost or high capacity. HP SAS drives are available in 146, 300, 450, 600, 900 and 1200GB capacities and ...


2

Some RAID cards can connect non-disk devices, but the 9500 does not support removable media devices. The 9500 has two completely separate interfaces, one to its disk and one to the host. The host interface provides only disk-like devices. It has no ability to provide a different interface to the host.


2

will be speed doubled? Yes, No, Maybe - anywhere in between - it entirely depends on the actual configuration and the nature of the use case. In real terms yes you should see some benefit but the only way to know is to test it as you need.


2

Write cache: disabled. Do you want the write cache disabled? If not, execute hdparm -W1 /dev/sdb and verify it was changed with hdparm -W /dev/sdb. Rerun your test. If it looks better add write_cache = on to /etc/hdparm.conf.


2

According to Supermicro Support the board is defect: Qoute: This board may need ECO 16238 update.


2

What you server experiences is basically a SATA renegotiation at a lower link speed after some problem communicating with the drives. These factors can be at work here (ordered by probability) very high-latency IOPS operations (eg: caused by SSD controller's garbage collection) resulting in SATA command timeout. Do your drive supports SATA Trim command? ...


2

Try using the master password to secure-erase the disk. Performing a secure erase will reset the user password. You can find lists of default master passwords by vendor through google searches. For example, this web site may be useful: https://ipv5.wordpress.com/2008/04/14/list-of-hard-disk-ata-master-passwords/


2

You'll probably get a 6Gbps link speed or a 3Gbps link speed, depending on the server, backplane and controller. A modern SATA SSD will likely be a 6Gbps device. But disk and storage speed isn't just about raw sequential I/O performance. The benefit of an SSD will be random I/O performance, which you're more likely to be impacted by.


2

Probably not. While there is nothing preventing you from hooking a SATA device other than an optical drive up to the SATA port for the optical drive, the engineering of your 1U server is so tight that there's nowhere to physically mount the drive. Unless you can find a hard drive or SSD that has the same physical form factor as the slim line OD, you'll ...


1

If the system doesn't see the drive there is nothing you can do via software to recover the drive as the drive no longer wants to talk to the OS, possibly because you've triggered some bug in its firmware and the drive now can't fully boot. In theory there could be a way by accessing the internal serial port of the drive, which was used in the past to ...


1

No. Since the drive is damaged, it has bad sectors and all I/O operations fail on those bad sectors. chkdsk can only repair logical filesystem issues, not physical issues.


1

Do you think 2 VMs on a SATA RAID 1 will allow a flawless symultanous usage of two somehow "desktop" virtual machines? It'll work fine though I'd need to understand your definition of 'flawless', and yes I would go with the HW RAID controller rather than just two disks to protect your data, make sure you get one that's on VMware's HCL so there'll be ...


1

Given that a single sata port is 600MB/s and each PCIe lane can only carry 250MB/s (2.0) or 500MB/s (3.0) its unlikely that anyone would design such a bottlenecked raid card for enterprise.


1

It is 6 Gb/s per port, with 8 ports you can get up to 48 Gb/s total. For SAS controllers and disks, you can use "SAS Expanders" to connect one SAS port to multiple drives. In this case, all drives connected to one SAS port share the total 6 Gb/s bandwidth. For this reason, for maximum performance we avoid SAS expanders and use controllers like the LSI ...


1

Modern HDD drives have a specific SATA command to limit the number of LBAs/sectors reported to the BIOS/OS. Can you issue smartctl <disk> and hdparm <disk> -N ? However, pay attention to not insert a numeric value after hdparm -N, and be sure to read the Host protected area section of hdparm manpage


1

You need to run the HP Smart Storage Administrator utility to create a logical drive on your physical hard disk. Otherwise, you won't be able to see the disks in your operating system. Please read HP's detailed instructions on how to configure the RAID on an HP ProLiant ML10v2 server.


1

I measured similar performance on a DL360G6, HBA SAS 9212-4i4e controller (JBOD) and 12x 3TB ZFS system. I never saw throughput higher than 400 MB/sec. Keep in mind that the MSA60 is quite old (10y+)


1

Apparently everyone saying to use enterprise drives...just because...are mistaken. There are several articles from companies that have actually done this vs just making stuff up. In short: enterprise drive failure rate 4.6%, consumer drive failure rate 4.2%. I really hate it when a well thought-out, passionate argument is destroyed by one tiny ugly ...


1

To power your drives just cut off a cpu power connector from a old power supply and cut off a molex connector and wire them like this Power Diagram: Then in the front drive tray part of your 2850 you will see a little rail and under it the is where the SCSI cables connect to, directly right from that there should be a little cpu power connector Just ...


1

I realize this post is old (Linux now lumps IDE/PATA drives in with /dev/sd?) but the easiest way to do this nowadays is sudo hdparm -I /dev/sd? | grep 'sd.\|ATA' Which gives the following output for a system with one SATA and one PATA drive: /dev/sda: ATA device, with non-removable media Transport: Serial, SATA 1.0a, SATA II Extensions, SATA Rev ...



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