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TS-659 Pro - 1 of 6 disks is of a different type
Posted: 14 Aug 2012, 20:09
by mons
I am the owner of a QNAP TS-659 Pro, which I have been running with six disks the whole time. Unfortunately, one of them is a different model from the other five. Something of a "problem" to a perfectionist like myself. Is there any reason to believe this would significantly affect performance or response-times? By observing the status-lights, I can see that the deviant disk blinks differently from the rest. And yes, the deviant is a green-disk. I have read some places that those are not the best choice for a NAS. I used to have six equal disks. But one had some errors on it. So I did not dare to keep using it.
PS: You may very well post an answer in Swedish if you like. I just figured that more people would understand my English than my Norwegian.
Re: TS-659 Pro - 1 of 6 disks is of a different type
Posted: 14 Aug 2012, 22:01
by P3R
Om disken är långsammare så kommer den teoretiskt att påverka prestanda då den kommer att vara "den svagaste länken i kedjan". Dock är det sällan diskarna som är flaskhalsar, speciellt inte i en RAID-lösning med så många diskar som sex. Normalt sett är det processorn (CPU) som begränsar prestanda.
Re: TS-659 Pro - 1 of 6 disks is of a different type
Posted: 14 Aug 2012, 23:12
by mons
Thanks for your reply! I do follow your logic regarding the CPU being the main bottle-neck in a RAID-configuration. But I was also thinking that response-time could be suffering more. In particular when waking up from power-save. But also in general use. Agree? If so, I might spend the extra bucks to get an equal replacement.
Re: TS-659 Pro - 1 of 6 disks is of a different type
Posted: 14 Aug 2012, 23:30
by P3R
mons wrote:But I was also thinking that response-time could be suffering more. In particular when waking up from power-save. But also in general use. Agree? If so, I might spend the extra bucks to get an equal replacement.
Jag tror inte att skillnaden är märkbar. Om den nya är en desktop-disk skulle jag byta för att genomgående få enterprise-diskar men inte av prestandaskäl.
Re: TS-659 Pro - 1 of 6 disks is of a different type
Posted: 15 Aug 2012, 08:45
by mons
It's a desktop-disk, yes. I will most likely get a replacement Enterprise-disk on warranty. So I should probably use that. But i was also thinking of using that disk in a remote NAS for backup. Guess I'll be better of putting the desktop-disk in that one then. Thanks a lot for your advise!
Re: TS-659 Pro - 1 of 6 disks is of a different type
Posted: 15 Aug 2012, 10:14
by sgatke
Hej Mons
Mine erfaringer (både privat og erhvervsmæssigt) er ikke gode når det kommer til 'green' diske i RAID miljøer.
Jeg vil anbefale dig at udskifte den pågældende disk med en enterprise disk. 'Green' diske er bestemt ikke lavet til den belastning der opstår når diskene kører i et RAID.
Til gengæld er 'green' diske gode at have i en desktop PC og der kan de hjælpe med at nedsætte strømforbuget.
Bottom line: Hold 'green' diske langt væk fra et RAID!
Den enterprise disk du vælger, behøver ikke være 100% identisk med dine 5 andre diske. Den skal selvfølgelig have samme størrelse (eller værre større), og den bør også have samme access time som de andre diske. Jeg har en enkelt gang været ude for at der var forskellig plads til rådighed på to ens diske (Western Digital 750GB og Seagate 750GB) men det er nogle år siden. Så vær opmærksom på den lille curiousity
Tillykke med din TS-659 Pro. Det er en rigtig lækker nas.
Re: TS-659 Pro - 1 of 6 disks is of a different type
Posted: 17 Aug 2012, 18:34
by ewook
Oy!
Diskmässigt rekommenderar jag följande:
http://www.qnap.com/useng/?sn=4085&lang=en-us
Kör själv Seagate green-diskar, som QNAP älskar att hacka på (aldrig varit diskarna hittils), men
rent generellt - beroende på vilka segment i raid-upplägget din disk har, så lär du inte märka någon skillnad - exemplariskt är som du säger att ha identiska diskar
.