Date: Sat, 15 Nov 2014 19:30:39 -0500 From: Mike Tancsa <mike@sentex.net> To: Zaphod Beeblebrox <zbeeble@gmail.com>, FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: OT-ish SATA port replicators vs. SAS "expanders" Message-ID: <5467F02F.3090304@sentex.net> In-Reply-To: <CACpH0Me7Y%2Bm6cENsg2otcP9agDp%2BwKPGnPxDafFfySPNkhsKBA@mail.gmail.com> References: <CACpH0Me7Y%2Bm6cENsg2otcP9agDp%2BwKPGnPxDafFfySPNkhsKBA@mail.gmail.com>
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On 11/15/2014 5:42 PM, Zaphod Beeblebrox wrote: > > The problem with the LSI 2008 is that it doesn't support SATA port > replicators (while it does support SAS expanders). > > What is the real difference? Is it possible to hack the driver to support > (obviously not booting from) SATA port replicators on the LSI? I cant speak to your expanders question, but we too have had too many issues with sata port multipliers. We are using a pair of LSI 9240-8i with the disks just in JBOD mode for ZFS and its been FAR more clean and easy to manage. Performance is excellent too. The cards can be had for ~$100 and expander cards about $150. Quite good performance too. # camcontrol devlist <ATA WDC WD40EFRX-68W 0A80> at scbus0 target 8 lun 0 (pass0,da0) <ATA WDC WD40EFRX-68W 0A82> at scbus0 target 9 lun 0 (pass1,da1) <ATA WDC WD40EFRX-68W 0A80> at scbus0 target 10 lun 0 (pass2,da2) <ATA WDC WD40EFRX-68W 0A80> at scbus0 target 11 lun 0 (pass3,da3) <ATA WDC WD40EFRX-68W 0A82> at scbus0 target 13 lun 0 (pass4,da4) <ATA WDC WD40EFRX-68W 0A80> at scbus0 target 15 lun 0 (pass5,da5) <ATA WDC WD2002FAEX-0 1L01> at scbus1 target 0 lun 0 (pass6,da6) <ATA WDC WD2002FAEX-0 1D05> at scbus1 target 1 lun 0 (pass7,da7) <ATA WDC WD2002FAEX-0 1D05> at scbus1 target 2 lun 0 (pass8,da8) <ATA WDC WD2001FASS-0 0101> at scbus1 target 3 lun 0 (pass9,da9) <ATA WDC WD2001FASS-0 0101> at scbus1 target 4 lun 0 (pass10,da10) <ATA WDC WD2001FASS-0 0101> at scbus1 target 5 lun 0 (pass11,da11) ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/
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