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Questions tagged [sata]

Serial ATA (SATA or Serial Advanced Technology Attachment) is a computer bus interface for connecting host bus adapters to mass storage devices such as hard disk drives and optical drives. Serial ATA was designed to replace the older ATA (AT Attachment) standard (also known as EIDE), offering many advantages over the older parallel ATA (PATA) interface.

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raid controller data transfer rate

I'm going to buy an 8-port raid controller for which the declared data trasfer rate is "Up to 6Gb/s per port". The declared connectors are "Two mini-SAS SFF8088". The maximum number of supported physical devices is "Up to 32". The controller is Dell…
Alfatau
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What is a maximum useful length of a SATA/SAS cable?

The server in question is DELL PowerEDGE SC1435. I am thinking about buying a LSI 1068e based card with two internal SFF-8087 ports. I intend to use the machine with external multiple hard disk enclosure as a ZFS based file server. I would connect…
SaleB
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Dell MD1000 and an x4 SAS connector throughput / layout

I'm trying to get my head around how a multi lane x4 SAS connector works in a DAS system such as the Dell MD1000. I understand that each lane is 3Gbps, and that multiple hard drives can share a lane. What I'm having trouble finding information on…
Eric C. Singer
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Best performance: 1tb vs larger drives in app using only sequential read/writes

I have a custom app that is multi-threaded; each thread runs on its own logical core (the workstation is a dual xeon, with 12 physical and 24 logical cores). So there are 24 threads running simultaneously. I've been researching the multitude of…
PaeneInsula
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Making SATA disk write cache safe

Supposedly (see, e.g., a question about it here), with NCQ enabled drives, the drive write cache is supposed to be safe, as in it doesn't lie to the OS about data being committed to the platters when it isn't. I'm trying to figure out what settings…
derobert
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Server Hot Swap Hard Drives

We have a HP Proliant DL380 G9 server. We have a separate data drive which consists of 4 x 1TB 7.2k 6Gb hot-swappable SAS drives RAID 5'd to provide a 3GB logical drive. We've noticed the performance of the server is quite slow and after running…
David Colley
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Is it possible to convert 4-pin floppy to SATA power?

I just bought a server and realized that it had power for all my drive bays, but not for the internal SSD I bought for it. It does, however, have 2 free 4-pin floppy power connectors: Is it possible to convert these to a SATA power connector using…
Hubro
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ZFS: SAS v SATA - does it matter?

I understand from NEC's white paper, Silent data corruption in disk arrays, that: some SAS drives should have a "T10-DIF" feature to detect silent data corruption; whereas "There is no standard for ATA-based drives (including SATA) that protects…
user61015
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How much impact does hard drive cache have on IO performance

How much impact does hard drive cache have on IO performance Are there any statistics or performance tests available that can tell me if there is a difference is 16MB vs 32MB Cache? If it matters, I am looking at SATAII 7200RPM Drives.
Jason
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HP 4TB SATA Midline in D2600 - what disk make is HP using & why WD RE4 don't work?

Does anyone know what make of disk HP are using in their 4TB SATA Midline & why WD RE4 don't work? So we use D2600 crates with HP 2TB disks, and just buy WD2003FYYS - pop them in old HP caddies. bonus: 5yr warranty, half price of HP. We just tried a…
robin H
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Would using SAS disks instead of SATA disks make sense over NFS for a VMWare datastore?

We are deciding whether to use SATA or SAS aggregates on our Filer for our VMWare datastore. We will be using NFS to connect the VMWare hosts to storage. Doesn't seem to make sense to use SAS disks that have 6GB/s pipeline (15000 RPM) if it's going…
Belmin Fernandez
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RAID - Multiple drives on one channel

I plan on building my first real RAID server soon. My idea is to have 8 to 12 hard drivers in RAID 5 or 50. It will serve as a storage server. I would prefer to have real hardware RAID. When looking for what to buy, a few questions came up. 1)…
Rapsey
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Nearline SAS on SATA controllers

I know that SAS drives cannot operate on a SATA controller. I know that SATA drives can operate on a SAS controller. But can Near-Line SAS drives, being SATA drives with a SAS controller, be used on A) only SAS controllers B) both SATA and SAS…
Vincent Vancalbergh
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Problem with slow hard disk

We bought some new PCs in my company with the new iCore 7 and 8GB memory and the following hard disk: WESTERN DIGITAL WD8000AARS 800GB CAVIAR GREEN SATA2 The problem we have is that after installing windows XP64 SP2 the write speed of the hard disk…
Makis Arvin
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Why are there two backplane connectors inside a Dell poweredge r410?

Just received a new 1U server - a Dell Poweredge r410. There are four hot-swap drive trays, which can accommodate either SAS or SATA drives. However, the odd thing is, instead of a single SFF8087 connector connecting the SAS HBA to the four-drive…
user36779
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