WD "RED" drives - are they any good for mdadm?
Thinking about trying some WD "RED" drives for a build. Model # WD20EFRX
Does anyone have any experience with these they would care to share?
Signature · 3 lines
Cheers, Maurice Hilarius eMail: /[email protected]/
Quoted 4 lines · maurice
Thinking about trying some WD "RED" drives for a build. Model # WD20EFRX
Does anyone have any experience with these they would care to share?
I haven't used them yet, but I did check their detailed specs a few weeks ago. As far as I can tell, they should be fine for MD raid, as long as you set the ERC to a reasonable value on every power cycle.
Phil
Quoted 1 line · maurice
Does anyone have any experience with these they would care to share?
I have three in production right now, having replaced failing green drives. This is the one that's been running the longest, so far without any problems at all. This is without any specific settings at all, just plugged it in and added it to the md-raid.
=== START OF INFORMATION SECTION ===
Device Model: WDC WD20EFRX-68AX9N0 Serial Number: WD-WMC<snip> LU WWN Device Id: 5 0014ee 0035938bd Firmware Version: 80.00A80 User Capacity: 2 000 398 934 016 bytes [2,00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 9 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Mon Dec 17 15:33:57 2012 CET SMART support is: Available - device has SMART capability. SMART support is: Enabled
SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 178 175 021 Pre-fail Always - 4066 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 15 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0 9 Power_On_Hours 0x0032 096 096 000 Old_age Always - 3406 10 Spin_Retry_Count 0x0032 100 253 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 15 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 14 193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 0 194 Temperature_Celsius 0x0022 116 110 000 Old_age Always - 31 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0
Signature · 1 line
Mikael Abrahamsson email: [email protected]
Quoted 4 lines
Thinking about trying some WD "RED" drives for a build. Model # WD20EFRX
Does anyone have any experience with these they would care to share?
AFAICS the red drives all spin at 5400RPM, so the speed from them will be quite a bit lower than from a 7k2 drive…
Vennlige hilsener / Best regards
roy
--
Roy Sigurd Karlsbakk
(+47) 98013356
[email protected]
http://blogg.karlsbakk.net/
GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt
--
I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med xenotyp etymologi. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk. --
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Quoted 2 lines · maurice
Thinking about trying some WD "RED" drives for a build. Model # WD20EFRX
I purchased four recently to extend a RAID6 set and they've been working just fine, although it's obviously still very early days. One thing to remember is that they're 4k sector drives - if you're using partitions, be sure to align them appropriately.
-mj
Signature · 2 lines
Michael-John Turner [email protected] <> http://mjturner.net/
Quoted 5 lines · maurice
Thinking about trying some WD "RED" drives for a build. Model # WD20EFRX
Does anyone have any experience with these they would care to share?
No, they're available big and cheap, but I confess that I don't see why a drive series (red) is needed for NAS use, as opposed to cabled (eSATA) connection. Not sure how the drive use would be different, but they are, as noted, big and cheap.
This has some data on the goals for the drive: http://www.newegg.com/Product/Product.aspx?Item=N82E16822236344&nm_mc=EMC-IGNEFL020813&cm_mmc=EMC-IGNEFL020813-_-EMC-020813-Index-_-InternalHardDrives-_-22236344-L0A
But the actual seek time, rpm and such, didn't pop up in the few places which I checked. Note these drives are (a) low power and noise, (b) designed for 7x24 operation, and (c) three year warranty rather than two. I would definitely expect them to be a good choice for a RAID array no matter how it's connected.
Signature · 3 lines
Bill Davidsen <[email protected]> "We have more to fear from the bungling of the incompetent than from the machinations of the wicked." - from Slashdot
Quoted 4 lines
No, they're available big and cheap, but I confess that I don't see why a drive series (red) is needed for NAS use, as opposed to cabled (eSATA) connection. Not sure how the drive use would be different, but they are, as noted, big and cheap.
It makes sense to me at least.
The big differentiators between the Red & Green/Blue series is ERC/TLER and the warranty terms. The drives come equipped with TLER set, which is helpful if you run RAID sets, the reasons for which this group is well versed in. The drives are also warrantied for 3yrs (as opposed to 2yrs) *and* specifically allow for use in enclosures of up to 4 bays. Apparently the Green & Blues aren't covered if use in enclosures.
I think at the end of the day the addition of Red's was market driven as a lot of people purchase these little home RAID boxes and find out the warrany on cheap drives doesn't cover that use, but at the same time, won't speend several hundred dollars *each* on enterprise drives.
I personally have used a 4 pack of these hung off a LSI 9204 raid controller and performance is okay but not spectacular. That'd be because of the drives supposedly vary from 5400 to 7200 rpm depending on load. I treat them like 5400rpm drives and the benchmarks seem to bear that out. Good for bulk storage in home use, not so good for bulk storage in commercial use, except perhaps in 3rd or 4th tier storage where who cares how fast they are, what I call legal drives. (As in, we only keep them around for data the auditors & legal types may want.)
Signature · 7 lines
Drew "Nothing in life is to be feared. It is only to be understood." --Marie Curie "This started out as a hobby and spun horribly out of control." -Unknown
Quoted 6 lines · Drew
Quoted 4 lines
No, they're available big and cheap, but I confess that I don't see why a drive series (red) is needed for NAS use, as opposed to cabled (eSATA) connection. Not sure how the drive use would be different, but they are, as noted, big and cheap.
It makes sense to me at least.
Quoted 7 lines
The big differentiators between the Red & Green/Blue series is ERC/TLER and the warranty terms. The drives come equipped with TLER set, which is helpful if you run RAID sets, the reasons for which this group is well versed in. The drives are also warrantied for 3yrs (as opposed to 2yrs) *and* specifically allow for use in enclosures of up to 4 bays. Apparently the Green & Blues aren't covered if use in enclosures.
That was my point, the requirements for NAS vs. an enclosure in a box on eSATA are essentially, run in an enclosure 7x24. Other than marketing the method of attaching the box of drives shouldn't matter to the drive. And they're cheaper than enterprise drives, which are mainly faster, an issue which really isn't going to matter a lot to SOHO users.
Quoted 6 lines
I think at the end of the day the addition of Red's was market driven as a lot of people purchase these little home RAID boxes and find out the warrany on cheap drives doesn't cover that use, but at the same time, won't speend several hundred dollars *each* on enterprise drives.
Quoted 11 lines
I personally have used a 4 pack of these hung off a LSI 9204 raid controller and performance is okay but not spectacular. That'd be because of the drives supposedly vary from 5400 to 7200 rpm depending on load. I treat them like 5400rpm drives and the benchmarks seem to bear that out. Good for bulk storage in home use, not so good for bulk storage in commercial use, except perhaps in 3rd or 4th tier storage where who cares how fast they are, what I call legal drives. (As in, we only keep them around for data the auditors & legal types may want.)
I would be interested to see if the performance really does get better with load, and how much load it takes. Maybe read a few TB off an array and measure the effective transfer rate every 10MB or so. Interesting project, I will probably try these the next time I need storage.
Signature · 4 lines
Bill Davidsen <[email protected]> We are not out of the woods yet, but we know the direction and have taken the first step. The steps are many, but finite in number, and if we persevere we will reach our destination. -me, 2010
Quoted 3 lines · Drew
I personally have used a 4 pack of these hung off a LSI 9204 raid controller and performance is okay but not spectacular. That'd be because of the drives supposedly vary from 5400 to 7200 rpm depending
Nah, the variable spin speed was an misinterpretation of some blogs and article writers from reading the WD material.
It's fixed spin speed, but it might vary within the same series with different capacities. Most of the time it's 5400-5900 for this type of drive.
Signature · 1 line
Mikael Abrahamsson email: [email protected]
Quoted 6 lines · Mikael Abrahamsson
Quoted 3 lines · Drew
I personally have used a 4 pack of these hung off a LSI 9204 raid controller and performance is okay but not spectacular. That'd be because of the drives supposedly vary from 5400 to 7200 rpm depending
Quoted 6 lines
Nah, the variable spin speed was an misinterpretation of some blogs and article writers from reading the WD material.
It's fixed spin speed, but it might vary within the same series with different capacities. Most of the time it's 5400-5900 for this type of drive.
Does anybody know if the REDs support Staggered Spin Up?
I could not find any info on that on WDC web site.
In the past, some WDC HDDs supported SSU by software and/or by jumper, but on these it seems unknown.
Thanks,
bye,
Signature · 1 line
piergiorgio
Quoted 6 lines · Piergiorgio Sartor
Does anybody know if the REDs support Staggered Spin Up?
I could not find any info on that on WDC web site.
In the past, some WDC HDDs supported SSU by software and/or by jumper, but on these it seems unknown.
All my WD drives (Greens and Blacks) do out of the box, so I'd assume the RED does too. In fact, I think the last drive I tried that did not was an old 250GB Maxtor. Everything else seems to.
Quoted 4 lines · Brad Campbell
Quoted 2 lines · Piergiorgio Sartor
Does anybody know if the REDs support Staggered Spin Up?
Quoted 8 lines
Quoted 4 lines
I could not find any info on that on WDC web site.
In the past, some WDC HDDs supported SSU by software and/or by jumper, but on these it seems unknown.
All my WD drives (Greens and Blacks) do out of the box, so I'd assume the RED does too. In fact, I think the last drive I tried that did not was an old 250GB Maxtor. Everything else seems to.
Maybe, but some do by software, some by jumper and some others by SATA pin. Or combinations of that.
So, I was curious, since one WDC I've can be configure by jumper (and software) and it has the "instructions" on the HDD itself.
bye,
Signature · 1 line
piergiorgio
Quoted 5 lines · Bill Davidsen
Quoted 4 lines · maurice
Thinking about trying some WD "RED" drives for a build. Model # WD20EFRX
Does anyone have any experience with these they would care to share?
I've bought 8 of them over the last 6 months. One was DOA. Right now they're all in a linux md raid6 (LSI 9220-8i HBA) and working great. The reason I selected this model is price per GB, TLER, and warranty.
Quoted 2 lines
But the actual seek time, rpm and such, didn't pop up in the few places which I checked.
This is one that I read before buying:
http://www.storagereview.com/western_digital_red_nas_hard_drive_review_wd30efrx
Quoted 2 lines · Drew
I personally have used a 4 pack of these hung off a LSI 9204 raid controller and performance is okay but not spectacular.
Agreed. I only get about 145 MB/s seq r/w on the outer edge of the spindle and I'm guessing it will probably be around 80 MB/s on the inner edge. Definitely not 15K enterprise drives. On the 8-disk raid6 I get about 130 MB/s rebuild, 1000 MB/s seq read.
--
DB