cm2187

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  1. cm2187

    LSI 9260-16i & WD Red Performance

    I tried the Red drives on an Adaptec card first but they kept falling off the array. The thing with the RE4 is that they are almost twice the price, and multiplied by 12.... Beside I don't have a huge workload anyway. My understanding of the WD Red is that it is effectively a WD Green with a modified firmware to support TLER and perhaps a couple of other things. So I would have thought that it should work in a hardware RAID array. But I have no experience with these drivers nor with an LSI card (have been using Adaptec so far) so I wasn't sure who I should blame.
  2. Hello I have a PC with a LSI Megaraid 9260-16i, and 12 WD Red 4TB disks in RAID 5. Cache is enabled, and a battery unit is installed. The read performance (copying large files) is OK, but writing large files is painfully slow (40-50MB/s, and this is a single copy at a time, which is kind of what I would expect from a software RAID). I had another PC with a similar set up, but with an Adaptec card and Hitachi drives (12 as well) and the write speed was more like 300MB/s. In your experience, is there anything I may have misconfigured, or is this the sort of experience I should expect with 12 disks in RAID 5 on an LSI card, or is it possible that some of the disks may have a technical problem (and if that is the case, is there any way to troubleshoot that?). I put the config below (and the info for the first physical disk, all others have the same config) if it helps. Thanks in advance! Charles ============================================================================== Adapter: 0 Product Name: LSI MegaRAID SAS 9260-16i Memory: 512MB BBU: Present Serial No: [sERIAL NUMBER] ============================================================================== Number of DISK GROUPS: 1 DISK GROUP: 0 Number of Spans: 1 SPAN: 0 Span Reference: 0x00 Number of PDs: 12 Number of VDs: 1 Number of dedicated Hotspares: 0 Virtual Drive Information: Virtual Drive: 0 (Target Id: 0) Name :RAID5 RAID Level : Primary-5, Secondary-0, RAID Level Qualifier-3 Size : 40.019 TB Sector Size : 512 Is VD emulated : Yes Parity Size : 3.637 TB State : Optimal Strip Size : 256 KB Number Of Drives : 12 Span Depth : 1 Default Cache Policy: WriteBack, ReadAhead, Direct, No Write Cache if Bad BBU Current Cache Policy: WriteBack, ReadAhead, Direct, No Write Cache if Bad BBU Default Access Policy: Read/Write Current Access Policy: Read/Write Disk Cache Policy : Disk's Default Encryption Type : None Bad Blocks Exist: No Is VD Cached: No Physical Disk Information: Physical Disk: 0 Enclosure Device ID: 245 Slot Number: 0 Drive's position: DiskGroup: 0, Span: 0, Arm: 0 Enclosure position: N/A Device Id: 19 WWN: 50014ee20935345e Sequence Number: 2 Media Error Count: 0 Other Error Count: 0 Predictive Failure Count: 0 Last Predictive Failure Event Seq Number: 0 PD Type: SATA Raw Size: 3.638 TB [0x1d1c0beb0 Sectors] Non Coerced Size: 3.637 TB [0x1d1b0beb0 Sectors] Coerced Size: 3.637 TB [0x1d1b00000 Sectors] Sector Size: 0 Logical Sector Size: 0 Physical Sector Size: 0 Firmware state: Online, Spun Up Commissioned Spare : No Emergency Spare : No Device Firmware Level: 0A80 Shield Counter: 0 Successful diagnostics completion on : N/A SAS Address(0): 0x500062b2006259d0 Connected Port Number: 0(path0) Inquiry Data: WD-[sERIALNUMBER]WDC WD40EFRX-68WT0N0 80.00A80 FDE Capable: Not Capable FDE Enable: Disable Secured: Unsecured Locked: Unlocked Needs EKM Attention: No Foreign State: None Device Speed: 6.0Gb/s Link Speed: 6.0Gb/s Media Type: Hard Disk Device Drive: Not Certified Drive Temperature :38C (100.40 F) PI Eligibility: No Drive is formatted for PI information: No PI: No PI Port-0 : Port status: Active Port's Linkspeed: 6.0Gb/s Drive has flagged a S.M.A.R.T alert : No