Chris Pollard

Yeah I see them for sale here in the UK for £230 which is over double the price of other 2TB drives, since the only benefit for me would be faster parity checks I don't think I'll bother.

Seems like an interesting idea.

Aria almost always have this drive as a "Super Special" but the price has dropped again this week :- http://www.aria.co.uk/SuperSpecials/Other+products/2+Terabyte+%282TB%29+Hitachi+7K2000%2C+32MB+SATA+?productId=38391 They also have Samsung 5400rpm green drives for £117.44 today. http://www.aria.co.uk/SuperSpecials/Other+products/2TB+Samsung+Spinpoint+F3+EcoGreen+SATA2+5400RPM+32MB+cache+HD203WI+?productId=39322

\o/ Well done

I can't find the article now but we had this on some Redhat servers at work.... anything below 10ms would report 0.000ms maybe this is something similar. Seem to remember it being something to do with 64bit registers as it only happened on their x64 boxes. Also here is the effect of having to arp. Cut through is disabled :- root@ubuntu:~$ ping 192.168.0.2 PING 192.168.0.2 (192.168.0.2) 56(84) bytes of data. 64 bytes from 192.168.0.2: icmp_seq=1 ttl=255 time=3.14 ms 64 bytes from 192.168.0.2: icmp_seq=2 ttl=255 time=0.335 ms 64 bytes from 192.168.0.2: icmp_seq=3 ttl=255 time=0.420 ms 64 bytes from 192.168.0.2: icmp_seq=4 ttl=255 time=0.302 ms 64 bytes from 192.168.0.2: icmp_seq=5 ttl=255 time=0.410 ms ^C --- 192.168.0.2 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4001ms rtt min/avg/max/mdev = 0.302/0.922/3.145/1.112 ms root@ubuntu:~$ ping 192.168.0.2 PING 192.168.0.2 (192.168.0.2) 56(84) bytes of data. 64 bytes from 192.168.0.2: icmp_seq=1 ttl=255 time=0.384 ms 64 bytes from 192.168.0.2: icmp_seq=2 ttl=255 time=0.357 ms 64 bytes from 192.168.0.2: icmp_seq=3 ttl=255 time=0.281 ms 64 bytes from 192.168.0.2: icmp_seq=4 ttl=255 time=0.349 ms ^C --- 192.168.0.2 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 2997ms rtt min/avg/max/mdev = 0.281/0.342/0.384/0.044 ms root@ubuntu:~$ sudo arp -d 192.168.0.2 root@ubuntu:~$ ping 192.168.0.2 PING 192.168.0.2 (192.168.0.2) 56(84) bytes of data. 64 bytes from 192.168.0.2: icmp_seq=1 ttl=255 time=3.15 ms 64 bytes from 192.168.0.2: icmp_seq=2 ttl=255 time=0.308 ms 64 bytes from 192.168.0.2: icmp_seq=3 ttl=255 time=0.484 ms 64 bytes from 192.168.0.2: icmp_seq=4 ttl=255 time=0.314 ms ^C --- 192.168.0.2 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3001ms rtt min/avg/max/mdev = 0.308/1.065/3.156/1.209 ms

First ping the machine will have to arp for the mac address too so this can be misleading.

Wait for SATA-3?

oh i see, before unraid it was in another array so it had plenty of uptime.

Its my parity drive... not much point pre-clearing it. (unless I'm missing something basic?)

btw... don't run nikto or paros against unraid... it kills it.

No, its my parity drive since I first setup unRAID so these are definitely new.

and you can test individual drive performance with hdparm :- root@Monkey:/boot/smarthistory# hdparm -t /dev/sdf /dev/sdf: Timing buffered disk reads: 250 MB in 3.01 seconds = 83.13 MB/sec root@Monkey:/boot/smarthistory# That might help you identify where your bottle necks are.

Pretty sure wholly is right, Standard 32bit PCI bus is shared. Also remember that when you do a parity check it has to read every single byte of every disk... with lots of disks that takes a long time whatever hardware you are using. Mine takes 15 hours, 4 drives on a PCI card and 6 on the motherboard. ( 25mb/s )

Well I ran another Parity check and another reallocated sector appeared. 3 Parity checks 3 new reallocated sectors. Think I'll buy a new drive and then thrash this one with the pre-clear script until they stop appearing.

Raid 0 might improve performance using cheap hardware..... of course if its painful to rebuild your setup it might be more hassle than its worth.

Life was so much easier when I could keep all my files on three 120gb disks with software raid 5

1st drive I've ever owned thats developed reallocated sectors without me doing something stupid to it. The drives from my old windows 2000 file server have 40000+ hours on them with no errors (well apart from one I dropped ).

ahhh now I see, the tunables on the settings page... those have nothing to do with system memory afaik.

I guess he means the default settings of unRAID are optimised for 512mb of RAM. Can he change them to something more suitable for 4gb of RAM. If thats the question then I think the answer is.... you don't need to change them, it does it automatically. Someone correct me if I'm wrong

Just a shame its my parity disk really. Means I have to swap it to get peace of mind regardless of whether I RMA it. I've got a few other of the same model with similar runtimes, none of those have any reallocated sectors.

Here's the SMART output :- Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x000f 100 100 051 Pre-fail Always - 6 3 Spin_Up_Time 0x0007 069 069 011 Pre-fail Always - 10010 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 488 5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 2 7 Seek_Error_Rate 0x000f 100 100 051 Pre-fail Always - 0 8 Seek_Time_Performance 0x0025 100 100 015 Pre-fail Offline - 0 9 Power_On_Hours 0x0032 099 099 000 Old_age Always - 3461 10 Spin_Retry_Count 0x0033 100 100 051 Pre-fail Always - 0 11 Calibration_Retry_Count 0x0012 100 100 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 52 13 Read_Soft_Error_Rate 0x000e 100 100 000 Old_age Always - 0 183 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 0 184 Unknown_Attribute 0x0033 100 100 000 Pre-fail Always - 0 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 188 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 0 190 Airflow_Temperature_Cel 0x0022 079 066 000 Old_age Always - 21 (Lifetime Min/Max 12/25) 194 Temperature_Celsius 0x0022 079 065 000 Old_age Always - 21 (Lifetime Min/Max 12/26) 195 Hardware_ECC_Recovered 0x001a 100 100 000 Old_age Always - 538921367 196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 2 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 100 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x003e 100 100 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x000a 100 100 000 Old_age Always - 11 201 Soft_Read_Error_Rate 0x000a 100 099 000 Old_age Always - 0 The unaid main page lists 22 errors and I see some ATA errors relating to this drive in the syslog. Oh and both reallocated sectors appeared right after the monthly parity check.... guessing a third will appear this month

I have a Samsung HD154UI which has had 2 reallocated sectors appear over the last month... anyone know if I'll be able to RMA it? Its still under warranty but I guess they could argue that its normal.

Someone needs to buy one and find out Some people are suggesting the 1TB ones format to 931mb which is the same as a standard 1TB drive afaik. Since the western digital website seems to make no mention of increased capacity for these drives one would assume we have to wait for a firmware which removes the 512b emulation mode before the additional storage is realised.

Apply for some jobs... get certified.. many claim that they are useless (technical people) but the fact of the matter is most management in IT fields are just as useless so they see certification as a good thing usually. Real world experience is what you need so if getting certified can help you get a foot in the door then why not do it. Definitely include anything that might be deemed useful to potential employers in your CV. Foot in the door jobs tend to be Helpdesk or Desktop support.... I started in Desktop support and now do Cisco routing, switching, SAN, Content Delivery, Firewalls, IDS, VOIP... in fact pretty much everything Cisco. I don't have any certifications or any academic qualifications. I guess as with any career you can't expect to walk into your ideal job straight off the bat, you'll need to slog it out doing the 3 finger salute like the rest of us did, if you are smart, join the right company and speak to the right people (most important maybe!) you'll soon find your way into a job you enjoy. Oh and with regards to doing the certifications you mentioned they are probably all possible to do using self study guides based on your past experience..

I'd also suggest good quality locking cables. cheap ones can cause a lot of headaches.