Date: Thu, 7 Jun 2018 18:24:36 +0300 From: Christos Chatzaras <chris@cretaforce.gr> To: FreeBSD <freebsd-questions@freebsd.org> Subject: Re: Toshiba disk low performance Message-ID: <E1F9FB16-B792-4A54-9E95-7F0CA8201469@cretaforce.gr> In-Reply-To: <DC4343C3-AC15-427E-9653-4C6A7F4E34C4@cretaforce.gr> References: <DC4343C3-AC15-427E-9653-4C6A7F4E34C4@cretaforce.gr>
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I also see this differences between other server disks and server with = toshiba disks. Toshiba disks show PIO 8192bytes and the other "good" = disks show PIO 512bytes. Toshiba disks: ada0 at ahcich1 bus 0 scbus0 target 0 lun 0 ada0: <TOSHIBA MG04ACA400EY FQ1B> ATA8-ACS SATA 3.x device ada0: Serial Number 382RK075F7GB ada0: 600.000MB/s transfers (SATA 3.x, UDMA5, PIO 8192bytes) ada0: Command Queueing enabled ada0: 3815447MB (7814037168 512 byte sectors) ada1 at ahcich2 bus 0 scbus1 target 0 lun 0 ada1: <TOSHIBA MG04ACA400EY FQ1B> ATA8-ACS SATA 3.x device ada1: Serial Number 383IK043F7GB ada1: 600.000MB/s transfers (SATA 3.x, UDMA5, PIO 8192bytes) ada1: Command Queueing enabled ada1: 3815447MB (7814037168 512 byte sectors) "Good" disks: ada0 at ahcich1 bus 0 scbus0 target 0 lun 0 ada0: <ST4000NM0245-1Z2107 SS03> ACS-3 ATA SATA 3.x device ada0: Serial Number ZC112ALJ ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 512bytes) ada0: Command Queueing enabled ada0: 3815447MB (7814037168 512 byte sectors) ada1 at ahcich2 bus 0 scbus1 target 0 lun 0 ada1: <ST4000NM0245-1Z2107 SS03> ACS-3 ATA SATA 3.x device ada1: Serial Number ZC111JK1 ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 512bytes) ada1: Command Queueing enabled ada1: 3815447MB (7814037168 512 byte sectors) > On 7 Jun 2018, at 18:02, Christos Chatzaras <chris@cretaforce.gr> = wrote: >=20 > I order a new dedicated server from a provider. The server has 2 = Toshiba disks and the disk peformance is very slow. >=20 > I test it using mysqlcheck -Ao which optimizes the databases and also = with 10GB mysql import at 2 servers - one with the Toshiba disks and the = other with Seagate disks. >=20 > During the tests gstat for the server with Toshiba disks show 3-4 = times lower disk operations / second compared to the other server. >=20 > I had the same problem (same Toshiba models) in a production server (I = notice it after I put it in production) and ask the datacenter to = replace one disk with different model, I rebuild RAID-1, then replace = the second disk and I rebuild the RAID-1. And the issue resolved. >=20 > It shows these disks as UDMA5 but other disks with good speed show = UDMA6. Also Linux shows these disks as UDMA5. >=20 > Here is the dmesg output: >=20 > ---- > ada0 at ahcich1 bus 0 scbus0 target 0 lun 0 > ada0: <TOSHIBA MG04ACA400E FP3B> ATA8-ACS SATA 3.x device > ada0: Serial Number Z5B7K1Q4FJKA > ada0: 600.000MB/s transfers (SATA 3.x, UDMA5, PIO 8192bytes) > ada0: Command Queueing enabled > ada0: 3815447MB (7814037168 512 byte sectors) > ada1 at ahcich2 bus 0 scbus1 target 0 lun 0 > ada1: <TOSHIBA MG04ACA400E FP3B> ATA8-ACS SATA 3.x device > ada1: Serial Number Z5B7K1Q5FJKA > ada1: 600.000MB/s transfers (SATA 3.x, UDMA5, PIO 8192bytes) > ada1: Command Queueing enabled > ada1: 3815447MB (7814037168 512 byte sectors) > ---- >=20 > What could be the problem with the Toshiba disks? > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to = "freebsd-questions-unsubscribe@freebsd.org"
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