hi,my hdd on the way out so buying new one.
7200rpm or 5400rpm
cache size 256 or 128
i would be using the hdd for battery library kontakt library for instance.
thanks

 

Take this: 7200 rpm - cache size 256 - SATA 6 Gbit/s

 

thanks

 

higher rpm HDDs are louder, but also depends on how many disk platters are actually inside (higher capacities = more platters),
higher cache size is better, but usually with higher capacities,

most important aspect about HDD is whether the drive is CMR or SMR (!!)
https://www.howtogeek.com/803276/cmr-vs.-smr-hard-drives-whats-the-difference/

also make sure the HDD has SATA and not SAS connection (different physical connector)

 

CMR seems to be better to go for is it?

 

SMR? CMR? Which hard drive is best suited for which purpose?

Shingled Magnetic Recording (SMR) or Conventional Magnetic Recording (CMR)? Many people ask this question when it comes to finding the right hard drive for the intended use. The different recording methods behave differently and are therefore sometimes better and sometimes worse suited for the intended purpose.

In our guide, we explain which recording methods there are, how they work and how they are best suited for which application. We also take a look at two specific types of hard drives with CMR recording methods: the new WD Red Plus series and the Seagate Ironwolf series.
Common recording methods for hard drives (CMR and SMR)

The basic recording process for hard drives is that a write head writes the data to the platter - it is stored there. A distinction is made between two common recording methods: CMR and SMR. Generally, CMR, or Conventional Magnetic Recording, is used when hard drives with pure PMR (Perpendicular Magnetic Recording) technology are used.

SMR, or Shingled Magnetic Recording, is the second recording method. PMR is also used in this method - similarities and differences to CMR are discussed in more detail further down in the text.

CMR
PMR, or Perpendicular Magnetic Recording, is a method in which the platter is magnetized horizontally and vertically. PMR is the successor to Longitudinal Magnetic Recording (LMR) and achieves a data density three times higher than its predecessor LMR - the read/write head has been optimized for this and the vertical positioning also contributes to this. This process was developed in order to be able to provide more than 750 GB for common 3.5-inch hard drives. With PMR, it is possible to write directly to the final storage location of the data on the hard drive without the data having to be rewritten on the hard drive again.

SMR
SMR, Shingled Magnetic Recording, writes data in an overlapping manner because it is based on the concept that the write head is larger and less delicate than the read head. The write head therefore writes very close to the previous track, so that it is still readable. However, the data from the following track is overwritten, which means that the next track may have to be written again after a successful recording process. If things are not going well, this "rewriting" has to continue over and over. This can slow down the writing process drastically. The advantage of this technology, however, is that the storage density is increased compared to PMR.

SMR hard drives also have an on-disk cache in the outer tracks, in addition to the standard controller cache. This is where PMR technology comes into play. After recording, the data is transferred from the controller to the SMR area as soon as possible. On the one hand, this process ultimately saves more space, but it also shows the big difference to CMR technology: If the faster on-disk cache is full before the controller can transfer the data to the SMR area, the cache must first be emptied or rewritten before new data can be saved. This is why, with large files, the transfer rate can drop after a certain amount of data because the cache is full and must first be cleared again.

When is SMR useful, when is CMR useful?

SMR hard drives are a good choice if they are primarily used as pure data storage or if a large hard drive is to be used for a PC on which data is to be stored. They offer more storage capacity and work more energy efficiently than CMR, which makes them ideal for archiving tasks. In general, SMR hard drives are not particularly suitable if the hard drive is to carry out constant and permanent writing processes, as this can lead to a cache overflow. In this case, you should definitely use a hard drive with CMR recording technology.
CMR hard drives are a good choice if you want to store data with high transfer rates or particularly large amounts of data. This includes a wide range of activities from music streaming to image editing to use for NAS servers.

WD Red Plus NAS hard drive
In the following, we will take a closer look at the WD80EFZZ WD Red Plus NAS hard drive with 8 TB from the WD Red Plus hard drive series. This is a CMR hard drive.
The WD Red was specially developed for NAS systems that have one to eight drive bays in 3.5-inch and 2.5-inch sizes. The speed is 5640 rpm; writing is done with CMR. With the NAS system of the Red hard drive

Seagate IronWolf NAS HDD 4TB
The second CMR model that we would like to take a closer look at is the Seagate IronWolf NAS HDD 4TB, SATA 6GB/s. The Iron Wolf hard drives are characterized by their robustness and scalability. They are particularly suitable for NAS systems with one to eight drive bays, desktop RAID and servers, multimedia server storage and the private cloud.

They demonstrate their quality particularly in corporate and business environments with a high data throughput and a high workload rate of 180 TB/year. This means that multiple users and the transfer of large data can be easily managed.

Conclusion: SMR as data storage, CMR for recurring writing processes

Both technologies (SMR and CMR) have their justification and respective applications. SMR is particularly suitable if you want large hard drives with lower material requirements and usually lower electrical power consumption that serve purely as data storage. For continuous writing activities and transferring large amounts of data at high transfer rates, i.e. when speed is important for large data transfers, CMR hard drives are the better choice.

www.reichelt.de/magazin/ratgeber/smr-cmr-welche-festplatte-eignet-sich-am-besten-fuer-welchen-zweck/

 

There is nothing wrong with SMR if used properly, it has a big disadvantage if used for multiple deletes of large files due to the shingle layout of the data tracks. If used for archival purposes as offline drives they work okay but use CMR for live usage for system drive, data or live backup drives.

 

thanks

 

sounds like me before I let anyone listen to my track!